taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
C92046B57BD758FEB497FBE4B1C63AA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1707495	https://doi.org/10.3897/zookeys.1284.189493.figure1	Figure 1. Petrarca chengi sp. nov., habitus (after alcohol fixation), anterior end left, light microscopy (A – C. Holotype; D, E. Paratypes). A. Lateral view, left side; B. Dorsal view; C. Ventral view; D, E. Lateral view, left side. Abbreviations: a 1 = antennules, mx 2 = maxillae, pe = penis, rab = rudimentary abdomen. Scale bars in µm.	Figure 1. Petrarca chengi sp. nov., habitus (after alcohol fixation), anterior end left, light microscopy (A – C. Holotype; D, E. Paratypes). A. Lateral view, left side; B. Dorsal view; C. Ventral view; D, E. Lateral view, left side. Abbreviations: a 1 = antennules, mx 2 = maxillae, pe = penis, rab = rudimentary abdomen. Scale bars in µm.	2026-07-03	Kolbasov, Gregory A.;Chan, Benny K. K.		Zenodo	biologists	Kolbasov, Gregory A.;Chan, Benny K. K.			
C92046B57BD758FEB497FBE4B1C63AA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1707496	https://doi.org/10.3897/zookeys.1284.189493.figure2	Figure 2. Petrarca chengi sp. nov., holotype, female, light microscopy. General morphology. A. Lateral view, right side with body proper (right valve of carapace removed); B. Rudimentary abdomen; C. Distal half of penis; D. Thoracopod 1; E. Thoracopods 2–6 (numbered) with seminal receptacles; F. Seminal receptacles of thoracopod 2. Abbreviations: a 1 = antennule, ad = adductor muscle, ca = carapace, lb = labrum, mx 2 = maxillae, pe = penis, rab = rudimentary abdomen, sr = seminal receptacles, t 1-6 = thoracopods. Scale bars in µm.	Figure 2. Petrarca chengi sp. nov., holotype, female, light microscopy. General morphology. A. Lateral view, right side with body proper (right valve of carapace removed); B. Rudimentary abdomen; C. Distal half of penis; D. Thoracopod 1; E. Thoracopods 2–6 (numbered) with seminal receptacles; F. Seminal receptacles of thoracopod 2. Abbreviations: a 1 = antennule, ad = adductor muscle, ca = carapace, lb = labrum, mx 2 = maxillae, pe = penis, rab = rudimentary abdomen, sr = seminal receptacles, t 1-6 = thoracopods. Scale bars in µm.	2026-07-03	Kolbasov, Gregory A.;Chan, Benny K. K.		Zenodo	biologists	Kolbasov, Gregory A.;Chan, Benny K. K.			
C92046B57BD758FEB497FBE4B1C63AA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1707497	https://doi.org/10.3897/zookeys.1284.189493.figure3	Figure 3. Petrarca chengi sp. nov., holotype, female, light microscopy. Antennules and mouth parts. A. Antennule, segments numbered; B. Claw and claw guard of last (5 th) antennular segment; C. Medial languette; D. Mandible; E. Cutting edge of mandible; F. Maxillule; G, H. Cutting edges of maxillules; I. Maxilla; J. Tip of maxilla. Abbreviations: ae = aesthetasc, cl = claw, clg = claw guard. Scale bars in µm.	Figure 3. Petrarca chengi sp. nov., holotype, female, light microscopy. Antennules and mouth parts. A. Antennule, segments numbered; B. Claw and claw guard of last (5 th) antennular segment; C. Medial languette; D. Mandible; E. Cutting edge of mandible; F. Maxillule; G, H. Cutting edges of maxillules; I. Maxilla; J. Tip of maxilla. Abbreviations: ae = aesthetasc, cl = claw, clg = claw guard. Scale bars in µm.	2026-07-03	Kolbasov, Gregory A.;Chan, Benny K. K.		Zenodo	biologists	Kolbasov, Gregory A.;Chan, Benny K. K.			
C92046B57BD758FEB497FBE4B1C63AA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1707498	https://doi.org/10.3897/zookeys.1284.189493.figure4	Figure 4. Petrarca chengi sp. nov., general view and mantle (carapace) structures (SEM). A. Habitus, lateral view, right side; B. Habitus, ventrolateral view; C. External surface of mantle with papillae, central part; D. External papilla of mantle; E. Tip of papilla with micro-pore (indicated by arrowhead). F. Micro-pores on surface of internal cuticle of mantle; G. Habitus with left valve removed; H. Rudimental abdomen, dorsolateral view. Abbreviations: a 1 = antennule, ad = adductor muscle, lb = labrum, mx 2 = maxillae, oc = oral cone, pe = penis, rab = rudimentary abdomen, thp = thoracopods. Scale bars in µm.	Figure 4. Petrarca chengi sp. nov., general view and mantle (carapace) structures (SEM). A. Habitus, lateral view, right side; B. Habitus, ventrolateral view; C. External surface of mantle with papillae, central part; D. External papilla of mantle; E. Tip of papilla with micro-pore (indicated by arrowhead). F. Micro-pores on surface of internal cuticle of mantle; G. Habitus with left valve removed; H. Rudimental abdomen, dorsolateral view. Abbreviations: a 1 = antennule, ad = adductor muscle, lb = labrum, mx 2 = maxillae, oc = oral cone, pe = penis, rab = rudimentary abdomen, thp = thoracopods. Scale bars in µm.	2026-07-03	Kolbasov, Gregory A.;Chan, Benny K. K.		Zenodo	biologists	Kolbasov, Gregory A.;Chan, Benny K. K.			
C92046B57BD758FEB497FBE4B1C63AA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1707499	https://doi.org/10.3897/zookeys.1284.189493.figure5	Figure 5. Petrarca chengi sp. nov., penis and antennules (SEM). A. Distal part of penis, anterolateral view; B. Posteroterminal process of penis with slit opening (indicated by arrowhead); C. Sponge-like cuticle on anterior part of penis; D. Left antennule, general view, segments numbered; E. Distal part of right antennule, segments numbered, rudimentary seta on 4 th segment enlarged, tiny setae at base of claw indicated by arrowheads; F. Tiny setae at base of claw (indicated by arrowheads), left antennule; G. Distal part of claw guard, 3 rudimentary setae indicated by arrowheads, right antennule; H. Tip of claw guard, 3 rudimentary setae indicated by arrowheads, left antennule. Abbreviations: ae = aesthetasc, cl = claw, clg = claw guard. Scale bars in µm.	Figure 5. Petrarca chengi sp. nov., penis and antennules (SEM). A. Distal part of penis, anterolateral view; B. Posteroterminal process of penis with slit opening (indicated by arrowhead); C. Sponge-like cuticle on anterior part of penis; D. Left antennule, general view, segments numbered; E. Distal part of right antennule, segments numbered, rudimentary seta on 4 th segment enlarged, tiny setae at base of claw indicated by arrowheads; F. Tiny setae at base of claw (indicated by arrowheads), left antennule; G. Distal part of claw guard, 3 rudimentary setae indicated by arrowheads, right antennule; H. Tip of claw guard, 3 rudimentary setae indicated by arrowheads, left antennule. Abbreviations: ae = aesthetasc, cl = claw, clg = claw guard. Scale bars in µm.	2026-07-03	Kolbasov, Gregory A.;Chan, Benny K. K.		Zenodo	biologists	Kolbasov, Gregory A.;Chan, Benny K. K.			
C92046B57BD758FEB497FBE4B1C63AA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1707500	https://doi.org/10.3897/zookeys.1284.189493.figure6	Figure 6. Petrarca chengi sp. nov., oral cone and thoracopods (SEM). A. Oral cone, ventrolateral view; B. Mouth opening; C. Thoracopods; D. Ctenoid scales on thoracopod 3. Abbreviations: lb = labrum, mo = mouth opening, mx 2 = maxillae, t 6 = thoracopod 6, thp = thoracopods 2-5.	Figure 6. Petrarca chengi sp. nov., oral cone and thoracopods (SEM). A. Oral cone, ventrolateral view; B. Mouth opening; C. Thoracopods; D. Ctenoid scales on thoracopod 3. Abbreviations: lb = labrum, mo = mouth opening, mx 2 = maxillae, t 6 = thoracopod 6, thp = thoracopods 2-5.	2026-07-03	Kolbasov, Gregory A.;Chan, Benny K. K.		Zenodo	biologists	Kolbasov, Gregory A.;Chan, Benny K. K.			
C92046B57BD758FEB497FBE4B1C63AA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1707501	https://doi.org/10.3897/zookeys.1284.189493.figure7	Figure 7. Map of distribution records of Ascothoracida of family Petrarcidae (? = doubtful record, see text for explanation). 1. Petrarca azorica Grygier, 1985; 2. Petrarca bathyactidis Fowler; 3. Petrarca chengi sp. nov.; 4. Petrarca goanna Grygier, 1991; 5. Petrarca indica Grygier, 1985; 6. Petrarca madreporae Grygier, 1996; 7. Petrarca morula Grygier, 1985; 8. Petrarca nozawai Kolbasov, Savchenko, Yu, Tsao, Ganmanee & Chan, 2023; 9. Petrarca okadai Grygier, 1981; 10. Petrarca rubus Kolbasov, Savchenko, Yu, Tsao, Ganmanee & Chan, 2023; 11. Petrarca sensoria Grygier, 1991; 12. Unidentified Petrarca specimens; 13. Introcornia australis Grygier, 1990; 14. Introcornia conjugans Grygier, 1983; 15. Zibrowia auriculata Grygier, 1985; 16. Zibrowia caudata Kolbasov, Tsao & Chan, 2025; 17. Zibrowia mucronata Kolbasov, Tsao & Chan, 2025; 18. Zibrowia trifurcata Kolbasov, Tsao & Chan, 2025; 19. Unidentified Zibrowia specimens.	Figure 7. Map of distribution records of Ascothoracida of family Petrarcidae (? = doubtful record, see text for explanation). 1. Petrarca azorica Grygier, 1985; 2. Petrarca bathyactidis Fowler; 3. Petrarca chengi sp. nov.; 4. Petrarca goanna Grygier, 1991; 5. Petrarca indica Grygier, 1985; 6. Petrarca madreporae Grygier, 1996; 7. Petrarca morula Grygier, 1985; 8. Petrarca nozawai Kolbasov, Savchenko, Yu, Tsao, Ganmanee & Chan, 2023; 9. Petrarca okadai Grygier, 1981; 10. Petrarca rubus Kolbasov, Savchenko, Yu, Tsao, Ganmanee & Chan, 2023; 11. Petrarca sensoria Grygier, 1991; 12. Unidentified Petrarca specimens; 13. Introcornia australis Grygier, 1990; 14. Introcornia conjugans Grygier, 1983; 15. Zibrowia auriculata Grygier, 1985; 16. Zibrowia caudata Kolbasov, Tsao & Chan, 2025; 17. Zibrowia mucronata Kolbasov, Tsao & Chan, 2025; 18. Zibrowia trifurcata Kolbasov, Tsao & Chan, 2025; 19. Unidentified Zibrowia specimens.	2026-07-03	Kolbasov, Gregory A.;Chan, Benny K. K.		Zenodo	biologists	Kolbasov, Gregory A.;Chan, Benny K. K.			
