taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
9147081718015BCB90F2441F1075F6C9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
9147081718015BCB90F2441F1075F6C9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772103	https://doi.org/10.3897/zookeys.1292.193168.figure14	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
9147081718015BCB90F2441F1075F6C9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772109	https://doi.org/10.3897/zookeys.1292.193168.figure20	Figure 20. Caridina excavatoides. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 490 - F 1 (A, B, K – N); MUMNH - CAR 616 - F 1 (C, E – J), MUMNH - CAR 616 - M 1 (D, O – P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N, O); 0.25 mm (I, P); 0.1 mm (G, K – M).	Figure 20. Caridina excavatoides. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 490 - F 1 (A, B, K – N); MUMNH - CAR 616 - F 1 (C, E – J), MUMNH - CAR 616 - M 1 (D, O – P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N, O); 0.25 mm (I, P); 0.1 mm (G, K – M).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
9147081718015BCB90F2441F1075F6C9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
A1F06A391B5F59A99F727E4A4DDF7FAD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
A1F06A391B5F59A99F727E4A4DDF7FAD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772103	https://doi.org/10.3897/zookeys.1292.193168.figure14	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
A1F06A391B5F59A99F727E4A4DDF7FAD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772105	https://doi.org/10.3897/zookeys.1292.193168.figure16	Figure 16. Caridina gracilipes. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 462 - D 1 (A, B, D – M); MUMNH - CAR 218 - D 1 (C); MUMNH - CAR 462 - M 1 (N; with appendix interna, O); MUMNH - CAR 462 - D 2 (N; without appendix interna). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, M – O); 0.25 mm (F, H, J – L).	Figure 16. Caridina gracilipes. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 462 - D 1 (A, B, D – M); MUMNH - CAR 218 - D 1 (C); MUMNH - CAR 462 - M 1 (N; with appendix interna, O); MUMNH - CAR 462 - D 2 (N; without appendix interna). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, M – O); 0.25 mm (F, H, J – L).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
A1F06A391B5F59A99F727E4A4DDF7FAD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772092	https://doi.org/10.3897/zookeys.1292.193168.figure3	Figure 3. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina gracilirostris and C. nilotica species groups. Sequences received from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 3. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina gracilirostris and C. nilotica species groups. Sequences received from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
62FA0673CB9751FB8AB1BE78A066AA09.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0EAEE97427A65D2DA10D582FA66696DE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0EAEE97427A65D2DA10D582FA66696DE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772103	https://doi.org/10.3897/zookeys.1292.193168.figure14	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0EAEE97427A65D2DA10D582FA66696DE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772104	https://doi.org/10.3897/zookeys.1292.193168.figure15	Figure 15. Caridina gracillima. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L – M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 497 - F 1 (A, B, D – K, M, N); MUMNH - CAR 431 - D 1 (C, L); MUMNH - CAR 497 - M 1 (O, P). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, N – P); 0.25 mm (F, H, J – M).	Figure 15. Caridina gracillima. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L – M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 497 - F 1 (A, B, D – K, M, N); MUMNH - CAR 431 - D 1 (C, L); MUMNH - CAR 497 - M 1 (O, P). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, N – P); 0.25 mm (F, H, J – M).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0EAEE97427A65D2DA10D582FA66696DE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772092	https://doi.org/10.3897/zookeys.1292.193168.figure3	Figure 3. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina gracilirostris and C. nilotica species groups. Sequences received from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 3. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina gracilirostris and C. nilotica species groups. Sequences received from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0EAEE97427A65D2DA10D582FA66696DE.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772090	https://doi.org/10.3897/zookeys.1292.193168.figure1	Figure 1. The river systems of southern Thailand. Map was generated in QGIS v. 3.24. 3 by compiling topographic base maps of rivers and lakes from the HydroSHEDS database (available at https://www.hydrosheds.org) and map raster data from NASA EARTHDATA (available at https://www.earthdata.nasa.gov/).	Figure 1. The river systems of southern Thailand. Map was generated in QGIS v. 3.24. 3 by compiling topographic base maps of rivers and lakes from the HydroSHEDS database (available at https://www.hydrosheds.org) and map raster data from NASA EARTHDATA (available at https://www.earthdata.nasa.gov/).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4516C949DABA5247A930263BE1A33402.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4516C949DABA5247A930263BE1A33402.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772112	https://doi.org/10.3897/zookeys.1292.193168.figure23	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4516C949DABA5247A930263BE1A33402.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772113	https://doi.org/10.3897/zookeys.1292.193168.figure24	Figure 24. Caridina johnsoni. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 470 - D 1 (A, B, E – N); MUMNH - CAR 383 - D 1 (L; without spine); MUMNH - CAR 470 - D 2 (C); MUMNH - CAR 470 - M 1 (D, O, P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N); 0.25 mm (L, O, P); 0.1 mm (G, I, K).	Figure 24. Caridina johnsoni. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 470 - D 1 (A, B, E – N); MUMNH - CAR 383 - D 1 (L; without spine); MUMNH - CAR 470 - D 2 (C); MUMNH - CAR 470 - M 1 (D, O, P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N); 0.25 mm (L, O, P); 0.1 mm (G, I, K).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4516C949DABA5247A930263BE1A33402.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0DB0C50F30415C87892C07A453B865ED.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4AED56D6A27B58AEB0E860EF5CA147E6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4AED56D6A27B58AEB0E860EF5CA147E6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772097	https://doi.org/10.3897/zookeys.1292.193168.figure8	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4AED56D6A27B58AEB0E860EF5CA147E6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772100	https://doi.org/10.3897/zookeys.1292.193168.figure11	Figure 11. Caridina kuehnei sp. nov. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 438 - F 8 (A, B, E – J); paratype MUMNH - CAR 438 - F 1 (C); paratype MUMNH - CAR 438 - M 1 (D). Scale bars: 1 mm (A – C); 0.5 mm (D – F, H, J); 0.25 mm (G, I).	Figure 11. Caridina kuehnei sp. nov. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 438 - F 8 (A, B, E – J); paratype MUMNH - CAR 438 - F 1 (C); paratype MUMNH - CAR 438 - M 1 (D). Scale bars: 1 mm (A – C); 0.5 mm (D – F, H, J); 0.25 mm (G, I).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4AED56D6A27B58AEB0E860EF5CA147E6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772101	https://doi.org/10.3897/zookeys.1292.193168.figure12	Figure 12. Caridina kuehnei sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 438 - F 8 (A – I); paratype MUMNH - CAR 438 - M 1 (K, L). Scale bars: 0.5 mm (A – F, I, K, L); 0.25 mm (J); 0.1 mm (G, H).	Figure 12. Caridina kuehnei sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 438 - F 8 (A – I); paratype MUMNH - CAR 438 - M 1 (K, L). Scale bars: 0.5 mm (A – F, I, K, L); 0.25 mm (J); 0.1 mm (G, H).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4AED56D6A27B58AEB0E860EF5CA147E6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772091	https://doi.org/10.3897/zookeys.1292.193168.figure2	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
8888D7591F705649A327AFDB058961DB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
8888D7591F705649A327AFDB058961DB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772108	https://doi.org/10.3897/zookeys.1292.193168.figure19	Figure 19. Caridina laevis. A. Cephalothorax and cephalic appendages of female; B. Top view of carapace; C. First pereopod; D. Second pereopod; E. Dactylus of third pereopod; F. Third pereopod; G. Dactylus of fifth pereopod; H. Fifth pereopod; I. Uropodal diaeresis; J. Preanal carina; K. Distal end of telson; L. Telson. Drawings were made of ZMB 30683-1 (A – F, I – L); ZMB 30702-3 (G, H). Scale bar: 2 mm (A, B); 1 mm (C, D, F – H); 0.5 mm (G, I, L); 0.25 mm (E, J, K).	Figure 19. Caridina laevis. A. Cephalothorax and cephalic appendages of female; B. Top view of carapace; C. First pereopod; D. Second pereopod; E. Dactylus of third pereopod; F. Third pereopod; G. Dactylus of fifth pereopod; H. Fifth pereopod; I. Uropodal diaeresis; J. Preanal carina; K. Distal end of telson; L. Telson. Drawings were made of ZMB 30683-1 (A – F, I – L); ZMB 30702-3 (G, H). Scale bar: 2 mm (A, B); 1 mm (C, D, F – H); 0.5 mm (G, I, L); 0.25 mm (E, J, K).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
8888D7591F705649A327AFDB058961DB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
EA03B90EB399505DAE41D66580980F7E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
EA03B90EB399505DAE41D66580980F7E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772097	https://doi.org/10.3897/zookeys.1292.193168.figure8	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
EA03B90EB399505DAE41D66580980F7E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772102	https://doi.org/10.3897/zookeys.1292.193168.figure13	Figure 13. Caridina lanceifrons. A. Ovigerous female; B. Top view of carapace; C, D. Cephalothorax and cephalic appendages of female; E. Cephalothorax and cephalic appendages of male; F. First pereopod; G. Second pereopod; H. Dactylus of third pereopod; I. Third pereopod; J. Dactylus of fifth pereopod; K. Fifth pereopod; L. Uropodal diaeresis; M. Preanal carina; N. Distal end of telson; O. Telson; P. First pleopod; Q. Second pleopod. Drawings were made of MUMNH - CAR 411 - D 1 (A, B, F – O); MUMNH - CAR 411 - D 2 (C); MUMNH - CAR 503 - F 1 (D); MUMNH - CAR 411 - M 1 (E, P, Q). Scale bars: 1 mm (A – E); 0.5 mm (F, G, I – K, P, Q); 0.25 mm (L – N); 0.1 mm (H, J).	Figure 13. Caridina lanceifrons. A. Ovigerous female; B. Top view of carapace; C, D. Cephalothorax and cephalic appendages of female; E. Cephalothorax and cephalic appendages of male; F. First pereopod; G. Second pereopod; H. Dactylus of third pereopod; I. Third pereopod; J. Dactylus of fifth pereopod; K. Fifth pereopod; L. Uropodal diaeresis; M. Preanal carina; N. Distal end of telson; O. Telson; P. First pleopod; Q. Second pleopod. Drawings were made of MUMNH - CAR 411 - D 1 (A, B, F – O); MUMNH - CAR 411 - D 2 (C); MUMNH - CAR 503 - F 1 (D); MUMNH - CAR 411 - M 1 (E, P, Q). Scale bars: 1 mm (A – E); 0.5 mm (F, G, I – K, P, Q); 0.25 mm (L – N); 0.1 mm (H, J).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
EA03B90EB399505DAE41D66580980F7E.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772091	https://doi.org/10.3897/zookeys.1292.193168.figure2	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0E20F72C44695F11A0C42FC64E9CFC18.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0E20F72C44695F11A0C42FC64E9CFC18.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772103	https://doi.org/10.3897/zookeys.1292.193168.figure14	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0E20F72C44695F11A0C42FC64E9CFC18.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772106	https://doi.org/10.3897/zookeys.1292.193168.figure17	Figure 17. Caridina macrophora. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 458 - D 1 (A, B, D – M); MUMNH - CAR 498 - D 1 (C); MUMNH - CAR 498 - M 1 (N, O). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, M); 0.25 mm (J – L, N, O); 0.1 mm (F, H).	Figure 17. Caridina macrophora. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 458 - D 1 (A, B, D – M); MUMNH - CAR 498 - D 1 (C); MUMNH - CAR 498 - M 1 (N, O). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, M); 0.25 mm (J – L, N, O); 0.1 mm (F, H).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
0E20F72C44695F11A0C42FC64E9CFC18.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772092	https://doi.org/10.3897/zookeys.1292.193168.figure3	Figure 3. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina gracilirostris and C. nilotica species groups. Sequences received from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 3. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina gracilirostris and C. nilotica species groups. Sequences received from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
E055ABDED90854CFBBBB5D39E41F8372.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
E055ABDED90854CFBBBB5D39E41F8372.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772112	https://doi.org/10.3897/zookeys.1292.193168.figure23	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
E055ABDED90854CFBBBB5D39E41F8372.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772114	https://doi.org/10.3897/zookeys.1292.193168.figure25	Figure 25. Caridina nangroma sp. nov. A. Ovigerous female; B. Top view of carapace; C – E. Cephalothorax and cephalic appendages of female; F. Cephalothorax and cephalic appendages of male; G. First pereopod; H. Second pereopod; I. Dactylus of third pereopod; J. Third pereopod; K. Dactylus of fifth pereopod; L. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 404 - F 7 (A, B, G – L); MUMNH - CAR 404 - H (C); MUMNH - CAR 404 - F 1 (D); MUMNH - CAR 402 - F 1 (E); paratype MUMNH - CAR 404 - M 1 (F). Scale bars: 1 mm (A – F); 0.5 mm (G, H, J, L); 0.1 mm (I, K).	Figure 25. Caridina nangroma sp. nov. A. Ovigerous female; B. Top view of carapace; C – E. Cephalothorax and cephalic appendages of female; F. Cephalothorax and cephalic appendages of male; G. First pereopod; H. Second pereopod; I. Dactylus of third pereopod; J. Third pereopod; K. Dactylus of fifth pereopod; L. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 404 - F 7 (A, B, G – L); MUMNH - CAR 404 - H (C); MUMNH - CAR 404 - F 1 (D); MUMNH - CAR 402 - F 1 (E); paratype MUMNH - CAR 404 - M 1 (F). Scale bars: 1 mm (A – F); 0.5 mm (G, H, J, L); 0.1 mm (I, K).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
E055ABDED90854CFBBBB5D39E41F8372.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772115	https://doi.org/10.3897/zookeys.1292.193168.figure26	Figure 26. Caridina nangroma sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 404 - F 7 (A – I); paratype MUMNH - CAR 404 - M 1 (K, L). Scale bars: 0.5 mm (A – F, I); 0.25 mm (K, L); 0.1 mm (G, H, J).	Figure 26. Caridina nangroma sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 404 - F 7 (A – I); paratype MUMNH - CAR 404 - M 1 (K, L). Scale bars: 0.5 mm (A – F, I); 0.25 mm (K, L); 0.1 mm (G, H, J).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
E055ABDED90854CFBBBB5D39E41F8372.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
F861CF180452506EA823BFFF3F5D9299.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
F861CF180452506EA823BFFF3F5D9299.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772103	https://doi.org/10.3897/zookeys.1292.193168.figure14	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
F861CF180452506EA823BFFF3F5D9299.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772107	https://doi.org/10.3897/zookeys.1292.193168.figure18	Figure 18. Caridina peninsularis. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 451 - D 1 (A, B, E – N); MUMNH - CAR 134 - D 1 (C); MUMNH - CAR 451 - M 1 (D, O, P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N – P); 0.25 mm (K – M); 0.1 mm (G, I).	Figure 18. Caridina peninsularis. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 451 - D 1 (A, B, E – N); MUMNH - CAR 134 - D 1 (C); MUMNH - CAR 451 - M 1 (D, O, P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N – P); 0.25 mm (K – M); 0.1 mm (G, I).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
F861CF180452506EA823BFFF3F5D9299.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772092	https://doi.org/10.3897/zookeys.1292.193168.figure3	Figure 3. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina gracilirostris and C. nilotica species groups. Sequences received from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 3. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina gracilirostris and C. nilotica species groups. Sequences received from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
FD8AE1BD52605D8FB9411B6DDA0AEF21.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
FD8AE1BD52605D8FB9411B6DDA0AEF21.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772111	https://doi.org/10.3897/zookeys.1292.193168.figure22	Figure 22. Caridina cf. rangoona. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 154 - D 1 (A, B, E – N); MUMNH - CAR 154 - F 1 (C); MUMNH - CAR 434 - F 1 (D); MUMNH - CAR 154 - M 1 (O, P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N); 0.25 mm (O, P); 0.1 mm (G, I, K – M).	Figure 22. Caridina cf. rangoona. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 154 - D 1 (A, B, E – N); MUMNH - CAR 154 - F 1 (C); MUMNH - CAR 434 - F 1 (D); MUMNH - CAR 154 - M 1 (O, P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N); 0.25 mm (O, P); 0.1 mm (G, I, K – M).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
FD8AE1BD52605D8FB9411B6DDA0AEF21.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772112	https://doi.org/10.3897/zookeys.1292.193168.figure23	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
FD8AE1BD52605D8FB9411B6DDA0AEF21.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
8C398F1A0A365176A4E3884C30ED65BB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
8C398F1A0A365176A4E3884C30ED65BB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772112	https://doi.org/10.3897/zookeys.1292.193168.figure23	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
8C398F1A0A365176A4E3884C30ED65BB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772116	https://doi.org/10.3897/zookeys.1292.193168.figure27	Figure 27. Caridina srivijaya sp. nov. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of male; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 502 - F 2 (A, B, D – I); paratype MUMNH - CAR 502 - M 1 (K – L). Scale bars: 1 mm (A, B); 0.5 mm (C – E, G, I); 0.1 mm (F, H).	Figure 27. Caridina srivijaya sp. nov. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of male; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 502 - F 2 (A, B, D – I); paratype MUMNH - CAR 502 - M 1 (K – L). Scale bars: 1 mm (A, B); 0.5 mm (C – E, G, I); 0.1 mm (F, H).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
8C398F1A0A365176A4E3884C30ED65BB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772117	https://doi.org/10.3897/zookeys.1292.193168.figure28	Figure 28. Caridina srivijaya sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 502 - F 8 (A – I); paratype MUMNH - CAR 502 - M 1 (K – L). Scale bars: 0.5 mm (A – F, I); 0.25 mm (J, K, L); 0.1 mm (G, H).	Figure 28. Caridina srivijaya sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 502 - F 8 (A – I); paratype MUMNH - CAR 502 - M 1 (K – L). Scale bars: 0.5 mm (A – F, I); 0.25 mm (J, K, L); 0.1 mm (G, H).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
8C398F1A0A365176A4E3884C30ED65BB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
9C54F115ADA75973A14BE68C1D21FB79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
9C54F115ADA75973A14BE68C1D21FB79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772097	https://doi.org/10.3897/zookeys.1292.193168.figure8	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
9C54F115ADA75973A14BE68C1D21FB79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772099	https://doi.org/10.3897/zookeys.1292.193168.figure10	Figure 10. Caridina sumatrensis. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 440 - D 1 (A, B, D – M); MUMNH - CAR 178 - D 1 (C); MUMNH - CAR 440 - M 1 (N, O). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, M – O); 0.25 mm (J – L); 0.1 mm (F, H).	Figure 10. Caridina sumatrensis. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 440 - D 1 (A, B, D – M); MUMNH - CAR 178 - D 1 (C); MUMNH - CAR 440 - M 1 (N, O). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, M – O); 0.25 mm (J – L); 0.1 mm (F, H).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
9C54F115ADA75973A14BE68C1D21FB79.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772091	https://doi.org/10.3897/zookeys.1292.193168.figure2	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
BBBF9DD488ED59CD9D8F17220D3E62E0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
BBBF9DD488ED59CD9D8F17220D3E62E0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772112	https://doi.org/10.3897/zookeys.1292.193168.figure23	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
BBBF9DD488ED59CD9D8F17220D3E62E0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772118	https://doi.org/10.3897/zookeys.1292.193168.figure29	Figure 29. Caridina takkola sp. nov. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 469 - F 8 (A, B, D – I); paratype MUMNH - CAR 469 - M 1 (C). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I); 0.1 mm (F, H).	Figure 29. Caridina takkola sp. nov. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 469 - F 8 (A, B, D – I); paratype MUMNH - CAR 469 - M 1 (C). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I); 0.1 mm (F, H).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
BBBF9DD488ED59CD9D8F17220D3E62E0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772119	https://doi.org/10.3897/zookeys.1292.193168.figure30	Figure 30. Caridina takkola sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 469 - F 1 (A – I); MUMNH - CAR 469 - M 1 (K – L). Scale bars: 0.5 mm (A – F, I, K, L); 0.25 mm (H, J); 0.1 mm (G).	Figure 30. Caridina takkola sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 469 - F 1 (A – I); MUMNH - CAR 469 - M 1 (K – L). Scale bars: 0.5 mm (A – F, I, K, L); 0.25 mm (H, J); 0.1 mm (G).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
BBBF9DD488ED59CD9D8F17220D3E62E0.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
975263344E8757ED96A3C66A1EFE2AC1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
975263344E8757ED96A3C66A1EFE2AC1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772112	https://doi.org/10.3897/zookeys.1292.193168.figure23	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	Figure 23. Living specimens of Caridina species. A. C. cf. rangoona, specimen MUMNH - CAR 434 - P 1 from Phang Nga Province, Takuatung District, Khum Mut Stream; B. C. johnsoni, specimen MUMNH - CAR 471 - P 1 from Surat Thani Province, Mueang District, Phunphin Stream; C, D. C. nangroma sp. nov.; C. paratype MUMNH - CAR 404 - P 1 and D. specimen MUMNHCAR 474 - P 1 from Chumphon Province, Lamae District, Lamae Stream; E, F. C. srivijaya sp. nov., paratypes; E. MUMNH - CAR 502 - P 1; F. MUMNH - CAR 502 - M 1; G. C. takkola sp. nov., paratype MUMNH - CAR 469 - P 1; H. C. tambralinga sp. nov., specimen MUMNH - CAR 489 - P 1 from Songkhla Province, Ranot District, Thale Noi Non-Hunting Area. Scale bar: 3 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
975263344E8757ED96A3C66A1EFE2AC1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772120	https://doi.org/10.3897/zookeys.1292.193168.figure31	Figure 31. Caridina tambralinga sp. nov. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 461 - F 2 (A, B, E – J); MUMNH - CAR 461 - H (C); paratype MUMNH - CAR 461 - M 1 (D). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J); 0.1 mm (G, I).	Figure 31. Caridina tambralinga sp. nov. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod. Drawings were made of paratype MUMNH - CAR 461 - F 2 (A, B, E – J); MUMNH - CAR 461 - H (C); paratype MUMNH - CAR 461 - M 1 (D). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J); 0.1 mm (G, I).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
975263344E8757ED96A3C66A1EFE2AC1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772121	https://doi.org/10.3897/zookeys.1292.193168.figure32	Figure 32. Caridina tambralinga sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 461 - F 7 (A – I); paratype MUMNH - CAR 461 - M 1 (K – L). Scale bars: 0.5 mm (A – F, I); 0.25 mm (K, L); 0.1 mm (G, H, J).	Figure 32. Caridina tambralinga sp. nov. A. Third maxilliped; B. Second maxilliped; C. Maxilla; D. First maxilliped; E. Mandible; F. Maxillula; G. Preanal carina; H. Uropodal diaeresis; I. Telson; J. Distal end of telson; K. First pleopod; L. Second pleopod. Drawings were made of paratype MUMNH - CAR 461 - F 7 (A – I); paratype MUMNH - CAR 461 - M 1 (K – L). Scale bars: 0.5 mm (A – F, I); 0.25 mm (K, L); 0.1 mm (G, H, J).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
975263344E8757ED96A3C66A1EFE2AC1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
F1CD91A0CE17505A93709A1BD06B38E9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
F1CD91A0CE17505A93709A1BD06B38E9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772103	https://doi.org/10.3897/zookeys.1292.193168.figure14	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
F1CD91A0CE17505A93709A1BD06B38E9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772110	https://doi.org/10.3897/zookeys.1292.193168.figure21	Figure 21. Caridina temasek. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 835 - F 1 (A, B, E – N); MUMNH - CAR 835 - F 2 (C), MUMNH - CAR 835 - M 1 (D, O, P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N); 0.25 mm (G, I, O, P); 0.1 mm (K – M).	Figure 21. Caridina temasek. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. Cephalothorax and cephalic appendages of male; E. First pereopod; F. Second pereopod; G. Dactylus of third pereopod; H. Third pereopod; I. Dactylus of fifth pereopod; J. Fifth pereopod; K. Uropodal diaeresis; L. Preanal carina; M. Distal end of telson; N. Telson; O. First pleopod; P. Second pleopod. Drawings were made of MUMNH - CAR 835 - F 1 (A, B, E – N); MUMNH - CAR 835 - F 2 (C), MUMNH - CAR 835 - M 1 (D, O, P). Scale bars: 1 mm (A – D); 0.5 mm (E, F, H, J, N); 0.25 mm (G, I, O, P); 0.1 mm (K – M).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
F1CD91A0CE17505A93709A1BD06B38E9.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772093	https://doi.org/10.3897/zookeys.1292.193168.figure4	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 4. Part of the Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina laevis species group. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
B4AE7AD752E35DDB9D6088F73F2CE792.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
B4AE7AD752E35DDB9D6088F73F2CE792.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772103	https://doi.org/10.3897/zookeys.1292.193168.figure14	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	Figure 14. Living specimens of Caridina species. A. C. thai, topotype MUMNH - CAR 861 - F 1 from Nakhon Ratchasima Province, Pak Chong District, Muak Lek Waterfall; B, C. C. gracillima, specimens; B. MUMNH - CAR 626 - P 1 from Trang Province, Mueang District, Trang River; C. MUMNH - CAR 631 - P 1 from Krabi Province, Mueang District, Tha Hindarn Stream; D. C. gracilipes, specimen MUMNH - CAR 462 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; E. C. macrophora, specimen MUMNH - CAR 800 from Nakhon Si Thammarat Province, Bang Khan District, Lam Dang Stream; F. C. peninsularis, specimen MUMNH - CAR 633 - P 1 from Phang Nga Province, Khum Mut Stream; G. C. excavatoides, specimen MUMNH - CAR 616 - F 2 from Nakhon Sri Thammarat Province, Thung Song District, Tha-Luang Stream; H. C. temasek, specimen MUMNH - CAR 835 - P 1 from Pattani Province, Mueang District, Pattani River. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4BF1F3AB703F52D284CA80FB5BF2AC7C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4BF1F3AB703F52D284CA80FB5BF2AC7C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772096	https://doi.org/10.3897/zookeys.1292.193168.figure7	Figure 7. Caridina typus. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 532 - D 1 (A, B, D – M); MUMNH - CAR 093 - D 1 (C); MUMNH - CAR 532 - M 1 (N, O). Scale bars: 1 mm (A, B, C, G, I, M); 0.5 mm (D, E, N, O); 0.25 mm (F, H, J – L).	Figure 7. Caridina typus. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 532 - D 1 (A, B, D – M); MUMNH - CAR 093 - D 1 (C); MUMNH - CAR 532 - M 1 (N, O). Scale bars: 1 mm (A, B, C, G, I, M); 0.5 mm (D, E, N, O); 0.25 mm (F, H, J – L).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4BF1F3AB703F52D284CA80FB5BF2AC7C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772097	https://doi.org/10.3897/zookeys.1292.193168.figure8	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
4BF1F3AB703F52D284CA80FB5BF2AC7C.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772091	https://doi.org/10.3897/zookeys.1292.193168.figure2	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
77BE255A74DA5E2F97CF59995C783CFD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772094	https://doi.org/10.3897/zookeys.1292.193168.figure5	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	Figure 5. Distribution map of Caridina in southern Thailand. A. C. typus, C. zhujiangensis, C. lanceifrons, and C. thai; B. C. sumatrensis and C. kuehnei sp. nov.; C. C. gracillima and C. gracilirostris; D. C. gracilipes, C. macrophora, and C. peninsularis; E. C. laevis, C. excavatoides, C. cf. rangoona, C. kottelati, C. nangroma sp. nov., and C. srivijaya sp. nov.; F. C. temasek, C. johnsoni, C. takkola sp. nov., and C. tambralinga sp. nov. Distribution ranges for all species were obtained from the current study, except for those of C. gracilirostris, C. thai, and C. kottelati whose distributions were obtained from Cai and Naiyanetr (2024).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
77BE255A74DA5E2F97CF59995C783CFD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772097	https://doi.org/10.3897/zookeys.1292.193168.figure8	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	Figure 8. Living specimens of Caridina species. A. C. typus, specimen MUMNH - CAR 532 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; B. C. zhujiangensis, specimen MUMNH - CAR 464 - P 1 from Nakhon Si Thammarat Province, Khanom District, Khao Phlai Dam; C – E. C. sumatrensis, specimens; C. MUMNH - CAR 430 - P 1 from Phuket Province, Thalang District, Bang Prae Stream; D. MUMNH - CAR 452 - P 1 from Satun Province, La-ngu District, La-ngu Stream; E. MUMNH - CAR 219 - P 1 from Ranong Province, Mueang District, Ngao Noi Stream; F. C. kuehnei sp. nov., paratype MUMNH - CAR 438 - P 1 from its type locality; G, H. C. lanceifrons, specimens; G. MUMNH - CAR 411 - P 1 from Prachuap Khiri Khan Province, Bang Saphan District, Sai Khu Waterfall; H. MUMNH - CAR 426 - F 1 from Chumphon Province, Mueang District, Hin Wang Stream. Scale bar: 4 mm.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
77BE255A74DA5E2F97CF59995C783CFD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772098	https://doi.org/10.3897/zookeys.1292.193168.figure9	Figure 9. Caridina zhujiangensis. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 464 - D 1 (A, B, D – M); MUMNH - CAR 464 - D 2 (C); MUMNH - CAR 464 - M 1 (N, O). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, M – O); 0.25 mm (F, H, J – L).	Figure 9. Caridina zhujiangensis. A. Ovigerous female; B. Top view of carapace; C. Cephalothorax and cephalic appendages of female; D. First pereopod; E. Second pereopod; F. Dactylus of third pereopod; G. Third pereopod; H. Dactylus of fifth pereopod; I. Fifth pereopod; J. Uropodal diaeresis; K. Preanal carina; L. Distal end of telson; M. Telson; N. First pleopod; O. Second pleopod. Drawings were made of MUMNH - CAR 464 - D 1 (A, B, D – M); MUMNH - CAR 464 - D 2 (C); MUMNH - CAR 464 - M 1 (N, O). Scale bars: 1 mm (A – C); 0.5 mm (D, E, G, I, M – O); 0.25 mm (F, H, J – L).	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
77BE255A74DA5E2F97CF59995C783CFD.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1772091	https://doi.org/10.3897/zookeys.1292.193168.figure2	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	Figure 2. Part of Maximum likelihood tree reconstructed from 16 s rRNA and COI genes, showing phylogenetic relationship in Caridina weberi, C. serrata, C. typus, C. sumatrensis, and C. lanceifrons species groups. Sequences newly obtained from the current study are labeled with black diamonds. Nodal supports are shown as ML bootstrap value / Bayesian posterior probability.	2026-09-15	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai		Zenodo	biologists	Macharoenboon, Kongkit;von Rintelen, Thomas;Klotz, Werner;Sutcharit, Chirasak;Siriwut, Warut;Jeratthitikul, Ekgachai			
