identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
A785EBA849C85C7ABA8D5600E82023DE.text	A785EBA849C85C7ABA8D5600E82023DE.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Camponotus lasiselene Wang & Wu 1994	<div><p>Camponotus lasiselene Wang &amp; Wu, 1994 . syn. nov.</p><p>Figs 1, 2, 3</p><p>Camponotus lasiselene Wang &amp; Wu, 1994: 24, fig. 3 (w.) China (Yunnan Province) (images examined). Combination in Camponotus (Orthonotomyrmex): Radchenko, 1997 d: 812.</p><p>Material examined.</p><p>Thailand — E Thailand; Chanthaburi Prov. • 1 minor worker; Pong Nam Ron District; 13. v. 2008; W. Jaitrong leg.; WJT 08 – E 027; THNHM –I–24820; THNHM (images examined) • 1 major worker; As previous; THNHM –I–24822; THNHM (images examined) — Chiang Mai • 1 minor worker; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.6548&amp;materialsCitation.latitude=19.2434" title="Search Plazi for locations around (long 98.6548/lat 19.2434)">Mae Sae</a>; 19.2434°N, 98.6548°E; ± 250 m 2; 969 m a. s. l.; 5. viii. 2024; gen. forager; M. T. Hamer; MTH 1371; THNHM • 1 minor worker; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.652245&amp;materialsCitation.latitude=19.238937" title="Search Plazi for locations around (long 98.652245/lat 19.238937)">Mae Sae</a>; 19.238938°N, 98.652248°E; ± 20 m 2; 1077 m a. s. l.; 10. viii. 2024; gen. forager; M. T. Hamer leg.; MTH 1268; ANTWEB 1011370; THNHM • 1 minor worker; As previous; IBBL • 1 minor worker; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.6548&amp;materialsCitation.latitude=19.2434" title="Search Plazi for locations around (long 98.6548/lat 19.2434)">Mae Sae</a>; 19.2434°N, 98.6548°E; ± 250 m 2; 969 m a. s. l.; 11. viii. 2024; gen. forager; M. T. Hamer leg.; MTH 1392; ANTWEB 1011187; IBBL • 1 minor worker; As previous; 11–14. viii. 2024; gen. forager; M. T. Hamer leg.; MTH 1331; THNHM .</p><p>China — Guangdong Prov. • 1 minor worker; Xidamingshan; 15. x. 1998; J. R. Fellowes leg.; ANTWEB 1015825; MBS 006294; HKBM • 1 minor worker; Diding Headwater Forest Nature Reserve; 1150 m a. s. l.; 9. vii. 1999; J. R. Fellowes leg.; MBS 013104; HKBM • 1 minor worker; As previous; MBS 013230; HKBM — Guangxi Prov. • 1 minor worker; Nonghua; 980 m a. s. l.; 13. vii. 1999; J. R. Fellowes leg.; MBS 013112; HKBM — Fujian Prov. • 1 minor worker; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=118.72156&amp;materialsCitation.latitude=26.32779" title="Search Plazi for locations around (long 118.72156/lat 26.32779)">Huangchulin NR</a>; 26.32779°N, 118.72156°E; ± 20 m 2; 301 m a. s. l.; 16. vi. 2023; LLex. r 12; L. Xuan leg.; HCL–EU–r 12–W1–27; ANTWEB 1011185; IBBL • 1 minor worker; As previous; ANTWEB 1011186; IBBL .</p><p>Distribution.</p><p>Camponotus obtusatus stat. nov. is recorded in Fujian Province, China for the first time, presenting the easternmost distribution for the species, completing its previous known distribution in Myanmar and Assam State (India). The species has been previously recorded in other provinces in mainland China (Guangdong, Guangxi, Hunan, Xizang, Yunnan) Nepal, Thailand and Vietnam (Zhou 2001; Yamane et al. 2002; Zhao et al. 2009; Zhang et al. 2012; Janicki et al. 2016; Guénard et al. 2017; Liu et al. 2020; Subedi et al. 2021; Jaitrong and Jeenthong 2022).</p><p>Ecology.</p><p>Two minor workers were collected from Huangchulin Nature Reserve, Fujian Province, within randomly collected leaf litter from a Eucalyptus plantation and extracted with a Winkler extractor over 72 hours. Solitary foraging workers were collected by hand on ornamental plants in a garden in Chiang Mai, Thailand.</p><p>Comments.</p><p>In the description of C. lasiselene syn. nov., the authors distinguished it from C. selene, but did not compare it against the subspecies C. selene obtusatus . We note several morphological similarities between the holotype specimen of C. lasiselene syn. nov. and the syntype specimen of C. selene obtusatus: in full – face view, head is trapezoidal in shape with angulate posterolateral corners (Figs 1 A, 2 A); in lateral view, the petiolar node is subrectangular with a flat apex and the metasoma has dense punctate sculpturing (Figs 1 B, 2 B); in dorsal view, anterior pronotal margin has only one concavity on each side (Figs 1 C, 2 C). Such similarities are consistent when examining images of the syntype worker and newly – collected specimens from the mainland China and Thailand, though there is some variation in the presence of acute humeral corners on the pronotal margin in dorsal view between individuals from the two localities (Fig. 3 E, F). On the other hand, C. selene differs from C. selene obtusatus by the following: in full – face view, posterolateral corners rounded (Figs 2 A, 11 A); in lateral view, the petiolar node is subrectangular with a triangular apex and the metasoma is smooth and shiny (Figs 2 B, 11 B); in dorsal view, anterior pronotal margins with two concavities on each side (Figs 2 C, 11 C). While we were unsuccessful in obtaining the syntype specimen of C. selene obtusatus for physical examination from Museo Civico di Storia Naturale, Italy, considering the distinctiveness of C. selene obtusatus compared to C. selene and the close morphological similarity of C. lasiselene syn. nov. with C. selene obtusatus, there is sufficient evidence to raise C. selene obtusatus to species rank, henceforth referred to as C. obtusatus stat. nov. and consider C. lasiselene syn. nov. as a junior synonym of C. obtusatus stat. nov.</p><p>Several studies (Wang and Wu 1994; Subedi et al. 2021; Jaitrong and Jeenthong 2022) have noted that C. obtusatus stat. nov. and C. selene are morphologically similar and only differ by the density of the pilosity. Pilosity, however, can be lost due to abrasion as we have observed in newly – collected specimens. Therefore, we believe that pilosity is not a consistent character to differentiate the two species and the aforementioned morphological differences between C. selene and C. obtusatus stat. nov. that we have observed are sufficient and more reliable to differentiate the two species.</p><p>Closer examination of minor workers collected from Fujian Province, China and Chiang Mai, Thailand revealed only subtle variations. The minor workers from Fujian differ from those in Thailand by the following: in lateral view, humeral corners of pronotums are less pronounced and not forming acute triangular corners, petiolar node taller than long; in dorsal view (Fig. 3). However, the variation in the shape of the petiole was also observed between specimens from the same locality in Thailand. Otherwise, all other morphological characteristics correspond to C. obtusatus stat. nov.</p><p>No major workers of C. obtusatus stat. nov. were described previously or collected in this study. Two previous studies have collected and identified major workers of this species in Yunnan Province, China and Thailand (Liu et al. 2020; Jaitrong and Jeenthong 2022), but there are some notable characters that differentiate the Yunnan specimens from the Thailand specimens: in full – face view, frontal carina more sharply convex rather than moderately convex; in lateral view, apex of petiolar node marginated instead of roundly convex; in dorsal view, propodeal spines form two rounded hooks instead of two straight spines. The minor workers from both studies correspond to C. obtusatus stat. nov.</p></div>	https://treatment.plazi.org/id/A785EBA849C85C7ABA8D5600E82023DE	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Chan, Marco;Hamer, Matthew T.;Guénard, Benoit	Chan, Marco, Hamer, Matthew T., Guénard, Benoit (2026): A new species complex in the genus Camponotus Mayr, 1861 (Hymenoptera: Formicidae), with the description of a new species. Contributions to Entomology 76 (1): 139-158, DOI: 10.3897/contrib.entomol.76.e189240
D50286E84DB850DAB0D05649EF303C00.text	D50286E84DB850DAB0D05649EF303C00.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Camponotus obtusatus (Emery 1895) Chan & Hamer & Guénard 2026	<div><p>Camponotus obtusatus (Emery, 1895) stat. nov.</p><p>Camponotus selene obtusatus (Emery, 1895) .</p><p>Polyrhachis selene subsp. obtusata Emery, 1895 m: 480 (w.) Myanmar. (images examined) Combination in Camponotus: Emery, 1896 j: 376. Combination in Camponotus (Orthonotomyrmex): Emery, 1925 d: 125. Subspecies of Camponotus selene: Forel, 1895: 456; Emery 1896: 376 (in list); Bingham 1903: 409; Chapman and Capco 1951: 242; Bolton 1995: 115; Dorow 1995: 65; Bharti et al. 2016: 26.</p></div>	https://treatment.plazi.org/id/D50286E84DB850DAB0D05649EF303C00	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Chan, Marco;Hamer, Matthew T.;Guénard, Benoit	Chan, Marco, Hamer, Matthew T., Guénard, Benoit (2026): A new species complex in the genus Camponotus Mayr, 1861 (Hymenoptera: Formicidae), with the description of a new species. Contributions to Entomology 76 (1): 139-158, DOI: 10.3897/contrib.entomol.76.e189240
DC9F23440ED85B37ACDC7941ECA7662B.text	DC9F23440ED85B37ACDC7941ECA7662B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Camponotus orthogonius Chan, Hamer & Guenard 2026	<div><p>Camponotus orthogonius Chan, Hamer &amp; Guénard sp. nov.</p><p>Figs 4, 5, 6 A, C, E</p><p>Type material.</p><p>Holotype worker. China — Hong Kong SAR • minor worker; Tai Lam; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.097305&amp;materialsCitation.latitude=22.425503" title="Search Plazi for locations around (long 114.097305/lat 22.425503)">Tsing Tam Village</a>; 22.4255026°N, 114.097303°E; ± 50 m 2; 102 m a. s. l.; 2. iv. 2025; M. Chan &amp; Y. H. Wu leg.; Hand coll.; Secondary forest; MCHC 051–23; ANTWEB 1010678; ZRC.</p><p>Paratype workers.</p><p>China — Hong Kong SAR • 1 major worker; same as holotype; MCHC 051–01; ANTWEB 1010676; IBBL • 1 major worker; As previous; MCHC 051–02; ANTWEB 1010690; HKBM • 1 major worker; As previous; MCHC 051–03; ANTWEB 1010691; THNHM • 1 minor worker; As previous; MCHC 051–04; ANTWEB 1011150; IBBL • 1 minor worker; As previous; MCHC 051–11; ANTWEB 1011151; IBBL • 1 minor worker; As previous; MCHC 051–13; ANTWEB 1011152; IBBL • 1 major worker; As previous; MCHC 051–21; ANTWEB 1010677; ZRC • 1 minor worker; As previous; MCHC 051–22; ANTWEB 1010680; HKBM • 1 minor worker; As previous; MCHC 051–24; ANTWEB 1010679; ZRC • 1 minor worker; As previous; MCHC 051–25; ANTWEB 1011153; IBBL • 1 minor worker; As previous; MCHC 051–30; ANTWEB 1011154; IBBL • 1 minor worker; As previous; MCHC 051–031; ANTWEB 1011155; IBBL • 1 minor worker; As previous; MCHC 051–32; ANTWEB 1010681; THNHM .</p><p>Additional material examined.</p><p>China — Hong Kong SAR • 1 minor worker; Lantau; Butterfly Hill; 7. x. 1996; J. R. Fellowes leg.; ANTWEB 1015823; MBS 006292; HKBM • As previous; MBS 013217; HKBM • 1 minor worker; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9137&amp;materialsCitation.latitude=22.22032" title="Search Plazi for locations around (long 113.9137/lat 22.22032)">Shui Hau</a>; 22.22032°N, 113.9137°E; ± 50 m 2; 55 m a. s. l.; 31. viii. 2023; M. T. Hamer leg.; Hand coll.; MTH 255; IBBL • 1 minor worker; Tai Mo Shan; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.1045&amp;materialsCitation.latitude=22.41088" title="Search Plazi for locations around (long 114.1045/lat 22.41088)">Kap Lung Forest Trail</a>; 22.41088°N, 114.1045°E; ± 50 m 2; 450 m a. s. l.; 17. ix. 2023; M. T. Hamer leg.; Hand coll.; MTH 445; IBBL • 1 minor worker; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9243&amp;materialsCitation.latitude=22.28578" title="Search Plazi for locations around (long 113.9243/lat 22.28578)">San Tau Village</a>; 22.28578°N, 113.9243°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg; gen. forager; MTH 491; IBBL • 1 minor worker; As previous; ANTWEB 1010453; IBBL • 1 minor worker; As previous; ANTWEB 1010454; IBBL • 1 major worker; As previous; ANTWEB 1010456; IBBL • 5 minor workers; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.1779&amp;materialsCitation.latitude=22.42784" title="Search Plazi for locations around (long 114.1779/lat 22.42784)">San Tau Village</a>; 22.42784°N, 114.1779°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg.; Hand coll.; MTH 475; IBBL • 5 minor workers and 1 major worker; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9243&amp;materialsCitation.latitude=22.2858" title="Search Plazi for locations around (long 113.9243/lat 22.2858)">San Tau Village</a>; 22.2858°N, 113.9243°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg.; gen. forager; MTH 429; IBBL • 3 minor workers; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9258&amp;materialsCitation.latitude=22.28459" title="Search Plazi for locations around (long 113.9258/lat 22.28459)">San Tau Village</a>; 22.28459°N, 113.9258°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg.; Hand coll.; MTH 425; IBBL • 1 minor worker; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9311&amp;materialsCitation.latitude=22.27853" title="Search Plazi for locations around (long 113.9311/lat 22.27853)">San Tau Village</a>; 22.27853°N, 113.9311°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg.; Hand coll.; MTH 461; IBBL • 3 minor workers; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9274&amp;materialsCitation.latitude=22.28078" title="Search Plazi for locations around (long 113.9274/lat 22.28078)">San Tau Village</a>; 22.28078°N, 113.9274°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg.; Hand coll.; MTH 493; IBBL • 7 minor workers; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9222&amp;materialsCitation.latitude=22.28765" title="Search Plazi for locations around (long 113.9222/lat 22.28765)">San Tau Village</a>; 22.28765°N, 113.9222°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg.; Hand coll.; MTH 476; IBBL • 2 minor workers; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9249&amp;materialsCitation.latitude=22.28538" title="Search Plazi for locations around (long 113.9249/lat 22.28538)">San Tau Village</a>; 22.28538°N, 113.9249°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg.; Hand coll.; MTH 421; IBBL • 2 minor workers Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9272&amp;materialsCitation.latitude=22.28269" title="Search Plazi for locations around (long 113.9272/lat 22.28269)">San Tau Village</a>; 22.28269°N, 113.9272°E; ± 20 m 2; 10 m a. s. l.; 20. ix. 2023; M. T. Hamer leg.; Hand coll.; MTH 477; IBBL • 1 minor worker; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.8845&amp;materialsCitation.latitude=22.2441" title="Search Plazi for locations around (long 113.8845/lat 22.2441)">Shing Fai Orchard</a>; 22.2441°N, 113.8845°E; ± 50 m 2; 178 m a. s. l.; 5. x. 2023; M. T. Hamer leg.; Hand coll.; MTH 643; IBBL • 12 minor workers; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9259&amp;materialsCitation.latitude=22.28422" title="Search Plazi for locations around (long 113.9259/lat 22.28422)">San Tau Village</a>; 22.28422°N, 113.9259°E; ± 500 m 2; 5 m a. s. l.; 16. x. 2023; M. T. Hamer leg.; Hand coll.; MTH 676; IBBL • 1 minor worker; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.91838&amp;materialsCitation.latitude=22.28656" title="Search Plazi for locations around (long 113.91838/lat 22.28656)">San Tau Village</a>; 22.28656°N, 113.918381°E; ± 50 m 2; 30 m a. s. l.; 16. x. 2023; M. T. Hamer et al. leg.; Vegetation beating; STV–VBI–3; ANTWEB 1010426; IBBL • 2 minor workers; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.9719&amp;materialsCitation.latitude=22.29836" title="Search Plazi for locations around (long 113.9719/lat 22.29836)">Pok Mong Village</a>; 22.29836°N, 113.9719°E; ± 300 m 2; 10 m a. s. l.; 6. v. 2024; M. T. Hamer leg.; Hand coll.; MTH 1088; IBBL • 1 minor worker; As previous; MTH 1102; IBBL • 1 minor worker and 1 major worker; Tai Lam; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.09068&amp;materialsCitation.latitude=22.4199" title="Search Plazi for locations around (long 114.09068/lat 22.4199)">Tsing Tam Village</a>; 22.4199°N, 114.090684°E; ± 50 m 2; 98 m a. s. l.; 18. i. 2025; Y. H. Wu leg.; Hand coll.; LT 051; IBBL • 1 major worker; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.891495&amp;materialsCitation.latitude=22.278048" title="Search Plazi for locations around (long 113.891495/lat 22.278048)">Tung O Ancient Trail</a>; 22.278047°N, 113.891491°E; ± 50 m 2; 27 m a. s. l.; 19. i. 2025; M. Chan leg.; Hand coll.; MCHC 037; IBBL • 2 minor workers and 1 major worker; Tai Lam; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.09068&amp;materialsCitation.latitude=22.4199" title="Search Plazi for locations around (long 114.09068/lat 22.4199)">Tsing Tam Village</a>; 22.4199°N, 114.090684°E; ± 50 m 2; 98 m a. s. l.; 28. ii. 2025; M. Chan &amp; Y. H. Wu leg.; Hand coll.; MCHC 050; IBBL • 1 minor worker; Lantau; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.92534&amp;materialsCitation.latitude=22.284946" title="Search Plazi for locations around (long 113.92534/lat 22.284946)">Tai O Ancient Trail</a>; 22.284946°N, 113.925337°E; ± 50 m 2; 15 m a. s. l.; 11. iii. 2025; B. W. Heath leg.; Hand coll.; MCHC 052; IBBL • 63 minor workers and 9 major workers; same as holotype; MCHC 051; IBBL — Hainan Prov. • 1 minor worker; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=109.5949&amp;materialsCitation.latitude=18.30511" title="Search Plazi for locations around (long 109.5949/lat 18.30511)">Simaling Ecological Park</a>; 18.30511°N, 109.5949°E; ± 4 m 2; 40.1 m a. s. l.; 4. vi. 2025; J. A. Siddiqui leg.; gen. coll.; HA 57–2 – CTMIN; ANTWEB 1012837; IBBL • 3 minor workers; As previous; HA 57–2; IBBL — Hong Kong SAR • 1 minor worker; Aberdeen; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.16047&amp;materialsCitation.latitude=22.254185" title="Search Plazi for locations around (long 114.16047/lat 22.254185)">Aberdeen Country Park</a>; 22.254184°N, 114.160469°E; ± 20 m 2; 152 m a. s. l.; 10. xi. 2025; M. Chan leg.; Hand Coll.; Secondary forest; MCHC 251; IBBL .</p><p>Minor worker</p><p>(Fig. 4). Diagnosis. Mediumsized workers (WL 1.46–1.87). Head length subequal to width (CI 93–100). With head in full – face view, antennal scape extending beyond occipital corner by ⅖ of its length. In lateral view, mesosoma dorsal outline nearly continuous and convex, only broken by metanotal groove; propodeal declivity concave, angle between declivity and dorsum forming a right angle. In dorsal view, anterior margin of pronotum convex, anterolateral margins sharply rounded.</p><p>Measurements.</p><p>Holotype: HL 1.18; HW 1.18; EL 0.37; EW 0.28; SL 1.17; CL 0.34; CW 0.52; MaL 0.46; WL 1.59; PH 0.41; PL 0.32; HFL 1.15; CI 100; EI 32; SI 99; FeI 97.</p><p>Paratypes (n = 9): HL 1.13–1.47; HW 1.12–1.37; EL 0.35–0.41; EW 0.27–0.31; SL 1.15–1.23; CL 0.31–0.47; CW 0.51–0.56; MaL 0.44–0.53; WL 1.6–1.87; PH 0.37–0.46; PL 0.33–0.42; HFL 1.12–1.33; CI 84–99; EI 28–32; SI 84–103; FeI 88–100.</p><p>Non – types (n = 19): HL 1.08–1.34; HW 1.05–1.37; EL 0.33–0.4; EW 0.26–0.31; SL 1.13–1.24; CL 0.3–0.43; CW 0.49–0.56; MaL 0.42–0.52; WL 1.46–1.82; PH 0.34–0.45; PL 0.29–0.39; HFL 1.06–1.59; CI 93–100; EI 29–33; SI 90–109; FeI 92–119.</p><p>Head: Head slightly longer than wide (CI 93–100). With head in full – face view, posterolateral corners broadly rounded. Eye elliptical, longer than wide, touching lateral margins of head, slightly protruding from head capsule in dorsal view. Mandible subtriangular, lateral margins convex, masticatory margin with five teeth including apical tooth; apical and pre – apical teeth larger than preceding teeth. Clypeus subtrapezoidal, longer than wide, anterior margin convex, posterior margin emarginate. Frontal carina short and slightly convex, fading just after anteriormost margin of eye. Frontal triangle small, anterior margin convex, lateral margins close to straight. Antenna with 12 segments, funicular segments trapezoidal. Antennal scape longer than head length, extending slightly beyond posterior margins by ⅖ its length; funicular segment II slightly longer than funicular segments III and IV; funicular segments II to XI equal in length; funicular segment XI slightly longer than funicular segment X.</p><p>Mesosoma: In lateral view, mesosoma dorsal outline convex; humeral corners of pronotum distinct; promesonotal suture and metanotal groove distinct; mesopleuron, metapleuron and propodeal pleuron undivided by sulcus. Dorsal outline of propodeum straight and flat. Propodeal declivity concave, forming a right angle with propodeal dorsum. In dorsal view, anterior margin of pronotum weakly extending medially; humeral corner of pronotum blunt, forming a right angle; promesonotal suture outline sharply rounded; metanotal groove outline straight; promesonotum trapezoidal, widest at humeral corner of pronotum and narrowest at the posterior margins of the propodeum; pronotum, mesonotum and propodeum trapezoidal and collectively narrowing posteriorly.</p><p>Metasoma: In lateral view, petiolar node higher than long, narrowly elliptical and weakly inclining anteriorly; anterior and posterior faces weakly convex; apex of petiole roundly convex; subpetiolar process absent in lateral view. Abdominal tergites III – VII subequal in length. In dorsal view, petiolar node broader than long and narrowly elliptical.</p><p>Sculpturing: Entire head, mesosoma and metasoma covered with fine punctate sculpturing. Mandible sparsely punctate. Sculpturing on propodeum grades from punctate to areolate – rugose on propodeal declivity. Petiole with substrigulate sculpturing in lateral view, while punctate at its apex in dorsal view.</p><p>Pilosity: Body surface with sparse erect to suberect hairs and abundant depressed pubescence. Stout hairs present on vertex of head, promesonotum, posterior dorsum of propodeum, apex of petiolar node and anterior face of abdominal tergite III. Scapes and tibiae with dense depressed pubescence, without any standing hairs. Orifice without any radial hairs.</p><p>Colouration: Head, mesosoma and abdomen dark grey in colour. Mandible and antennal scape dark brown. Coxa black – grey; trochanter femur and tibia dark – brown; tarsus orange.</p><p>Major worker</p><p>(Fig. 5). Diagnosis. Medium – sized workers (WL 1.99–2.18). Head subrectangular, longer than wide (CI 84–86). With head in full – face view, antennal scape of medium length, touching posterior margin of head; head bicoloured, anterior clypeal margin to the antennal insertion orange, antennal scrobe to the occipital corners black. In lateral view, mesosoma dorsum outline weakly convex; metanotal groove shallow; propodeal declivity concave, forming a right angle with dorsum of propodeum. In dorsal view, anterior pronotum margin weakly extending medially, humeral corners of pronotum bluntly angled; promesonotal suture slightly impressed; metanotal groove moderately impressed.</p><p>Measurements.</p><p>Paratypes (n = 4): HL 1.83–2.02; HW 1.58–1.7; EL 0.43–0.47; EW 0.33–0.36; SL 1.14–1.26; CL 0.66–0.8; CW 0.58–0.64; MaL 0.61–0.68; WL 1.99–2.18; PH 0.48–0.57; PL 0.38–0.42; HFL 1.25–1.3; CI 84–86; EI 27–28; SI 68–76; FeI 74–79.</p><p>Head: Head rectangular in shape, longer than wide (CI 84–86). With head in full – face view, lateral margins of head weakly convex and parallel, posterior margin straight; posterolateral corners of head narrowly angled; posterior margin straight. Anterior third of head dorsum obliquely truncated and slightly concave in lateral view. Eye longer than wide, elliptical in shape. Mandible subtriangular, with five teeth on masticatory margin, including apical tooth. Clypeus subrectangular, slightly longer than wide; anterior and anterolateral margin of clypeus weakly concave and divided by a blunt angle, lateral margins weakly convex; median clypeal carina present and well impressed, shorter than frontal carina. Anterior margin of head surpassing clypeus, forming prominent genae. Frontal carina convex, diverging first and then converging posteriorly, almost reaching posterior margin of eye. Frontal triangle extremely small, anterior margin convex, while lateral margin weakly concave. Antennal scrobe mostly exposed, narrowly covered by frontal carina. Antenna with 12 funicular segments, antennal scape shorter than head length, just touching posterior margins of head. Funicular segments trapezoidal in shape; pedicel slightly longer than funicular segments II and III; funicular segments II – X equal in length; funicular segment XI slightly longer than funicular segment X.</p><p>Mesosoma: In lateral view, dorsal outline of mesosoma weakly convex; pronotal margin grading from sharp to soft – edged; promesonotal suture shallowly impressed; metanotal groove moderately narrowly impressed; propodeal margin dorsum straight, forming a right angle with the declivity, the latter deeply concave; mesopleuron, metapleuron and propodeal pleuron undivided by sulcus. In dorsal view, mesosoma trapezoidal, narrowing posteriorly; humeral corners of pronotum bluntly angled; promesonotal suture broadly round; metanotal groove outline transverse; posterior margin of propodeum subtly rounded; pronotum, mesonotum and propodeum all subtrapezoidal and narrowing posteriorly.</p><p>Metasoma: In lateral view, petiolar node roughly conical, longer than high and weakly inclining anteriorly; anterior face weakly convex, posterior face moderately convex; apex of petiolar node roundly convex; subpetiolar process absent; abdominal tergite III shorter than IV and V. In dorsal view, petiolar node wider than long and narrowly elliptical.</p><p>Sculpturing: Head and mesosoma densely, finely and uniformly punctate. With head in full – face view, anterior portion of head densely coarsely punctate with interface reticulate; mandibles sparsely coarsely punctate. Face of propodeal declivity punctate to areolate – rugulose. Petiole substrigulate. Abdominal tergites III to VII finely punctate, with anterior sections between abdominal segment III, IV and V substrigulate.</p><p>Pilosity: Head, mesosoma and abdomen with sparse erect to suberect hairs and abundant depressed pubescence. Stout hairs present on lateral margins and dorsum of head, mandibles, posterior dorsum of propodeum, apex of petiolar node and abdominal tergite III. Scapes and tibiae with dense depressed pubescence, without any standing hairs. Orifice without any radial hairs.</p><p>Colouration: Body black in colour. Head colour divided into two parts: orange anteriorly, up to ⅖ of the head and black – grey posteriorly, distinctly separated by a margin in frontal and lateral view. Mandibles and antenna red – brown. Coxa black – grey; trochanter orange; femur and tibia dark – brown; colour from basitarsus to the tarsal claw grades from dark – brown to dark orange.</p><p>Comparative notes.</p><p>Within the Orthonotomyrmex species found in Southeast Asia, C. orthogonius sp. nov. most closely resembles C. siamensis from Thailand. Overall, C. orthogonius sp. nov. is larger than C. siamensis in both the minor (WL of C. orthogonius sp. nov. = 1.46–1.87; WL of C. siamensis = 1.29–1.42) and major (WL of C. orthogonius sp. nov. = 1.99–2.18; WL of C. siamensis = 1.72–1.75) worker subcastes. In the minor worker subcaste, C. orthogonius sp. nov. can be distinguished from C. siamensis by the following: in lateral view, metanotal groove moderately impressed instead of deeply impressed, the propodeum is relatively longer than C. siamensis and forms a continuous margin with the mesonotum, instead of elevated slightly above the mesonotum (Fig. 8), petiolar node relatively higher (PH of C. orthogonius sp. nov. = 0.34–0.47; PH of C. siamensis = 0.33–0.36) and weakly inclining anteriorly (Figs 4 B, 6 C, 6 D, 7 D); in dorsal view, the promesonotal suture outline is more sharply rounded instead of subtly rounded (Fig. 9). In comparison with minor workers of C. siamensis collected from Laos, C. orthogonius sp. nov. can be differentiated by the right – angled pronotal humeral corners, instead of acutely angled. In the major worker subcaste, C. orthogonius sp. nov. can be distinguished from C. siamensis by the following: with head in full – face view, head is wider than C. siamensis (HW of C. orthogonius sp. nov. = 1.58–1.70; HW of C. siamensis = 1.35–1.42), posterior margin nearly straight instead of weakly concave, antenna scape reaching posterodorsal corner of head (Figs 4 A, 7 C); in lateral view, propodeum is relatively longer, posterodorsal corners of propodeum right angled instead of narrowly rounded (Fig. 8), petiolar node weakly inclining anteriorly instead of strongly inclining anteriorly (Figs 4 B, 7 F); in dorsal view, anterior pronotal margin subtly convex to notably convex (Figs 4 C, 7 I). Only in Hainan Province, China have we recorded both species so far and specimens maintain the distinctness as discussed above; therefore, we believe that C. orthogonius sp. nov. is a distinct species from C. siamensis and not a result of allopatric speciation (Fig. 6).</p><p>In China, C. orthogonius sp. nov. most closely resembles C. obtusatus stat. nov. and C. selene . Characters that distinguish the minor worker subcaste of C. orthogonius sp. nov. from the latter two species by the following: eyes are larger in C. orthogonius sp. nov. (EW of C. orthogonius sp. nov. = 0.33–0.41, EW of C. lasiselene syn. nov. = 0.24, EW of C. selene not provided); with head in full face view, posterolateral margins broadly convex, instead of bluntly angled in C. obtusatus stat. nov. (Figs 1 A, 2 A, 3 A, 3 B, 4 A), antenna scape surpassing posterolateral corners of head by approximately ⅖ of its length instead of ⅓ of its length in C. obtusatus stat. nov. (Figs 1 A, 2 A, 3 A, 3 B, 4 A); in lateral view, propodeal spines are absent, the apex of petiolar node rounded, instead of flat in C. obtusatus stat. nov. or angulate in C. selene and the body with sparse pilosity, instead of with dense pilosity (Figs 1 B, 2 B, 3 C, 3 D, 4 B). In dorsal view, pronotum is narrower, the propodeum margin is narrow and straight instead a pair of forcipiform teeth (Fig. 9).</p><p>Etymology.</p><p>The specific name refers to the right – angled propodeum in lateral view observed in both the minor and major workers. The epithet is the nominative singular masculine Latin adjective for “ orthogonal ”, meaning “ at a right angle ”.</p><p>Distribution.</p><p>Camponotus orthogonius sp. nov. is recorded in Hong Kong where it has a wide local distribution, with specimens collected from Hong Kong Island, New Territories and Lantau Island. It is also found in Hainan Province and can also be suspected to be found in neighbouring provinces to Hong Kong in southern China, such as Guangdong and Guangxi Provinces. Records on iNaturalist of C. obtusatus stat. nov. in southeast China should be interpreted with caution and are, in some cases, misidentifications of C. orthogonius sp. nov.</p><p>Ecology.</p><p>A nest of 148 individuals consisting of 73 minor workers, 13 major workers and 62 larvae, was collected on 3 April 2025 in multiple twigs from a dead tree in a young secondary forest near Tsing Tam Village, Hong Kong. The tree had collapsed due to ongoing slope maintenance, exposing the colony. However, no reproductives were observed or collected along with the nest. The presence of larvae and workers in multiple twigs suggests a potential polydomic structure of the colony, which would need to be confirmed in the future. Individual workers have been observed foraging on handrails in country parks during the day and have also been collected through vegetation beating and malaise trap. Individual foraging workers have also been found in small crevices between concrete tiles in a farmland in Hainan. Altogether, this suggests an arboreal nesting and foraging lifestyle in this species.</p><p>It is interesting to note that the major workers present partially phragmotic heads, similar to species in the Camponotus recitulatus – group (Ward et al. 2025) which resembles those observed in the genera Colobopsis and Gesomyrmex Mayr, 1868, also found in the region. Ward and Boudinot (2021) suggested that the similarity in the head morphology could be an example of convergent evolution, where the phragmotic heads of Colobopsis and some Camponotus species act as blockades to the nest entrance to prevent entry by intruders (Mayr 1861). However, this behaviour in C. orthogonius sp. nov. has not been observed directly in the field and can only serve as speculation at the moment.</p></div>	https://treatment.plazi.org/id/DC9F23440ED85B37ACDC7941ECA7662B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Chan, Marco;Hamer, Matthew T.;Guénard, Benoit	Chan, Marco, Hamer, Matthew T., Guénard, Benoit (2026): A new species complex in the genus Camponotus Mayr, 1861 (Hymenoptera: Formicidae), with the description of a new species. Contributions to Entomology 76 (1): 139-158, DOI: 10.3897/contrib.entomol.76.e189240
5A13017713C059279F53F2278DCC6622.text	5A13017713C059279F53F2278DCC6622.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Camponotus siamensis Jaitrong & Jeenthong 2022	<div><p>Camponotus siamensis Jaitrong &amp; Jeenthong, 2022</p><p>Figs 6 B, 6 D, 6 F, 7 A – I</p><p>Camponotus siamensis Jaitrong &amp; Jeenthong, 2022: 34, figs 1 A – F (s. w.) Thailand. Holotype minor worker. Primary type locality: Thailand: NE Thailand, Mukdahan Province, Chamcha – I District, Cheang Chang Niam Village, mixed deciduous forest (MDF), 8. vi. 2007, WJT 07 – TH – 1075 (W. Jaitrong). THNHM (images examined) . 9 paratype minor workers, 3 paratype major workers. Secondary type locality: 7 paratype minor workers, 3 paratype major workers with same data as holotype; 2 paratype minor workers NE Thailand, Mukdahan Province, Chamcha – I District, Kheang [Cheang] Chang Niam Village, dry evergreen forest (DEF), 4. ix. 2007 (W. Jaitrong). THNHM . Secondary type specimens: minor workers: THNHM –I–24795 to THNHM –I–24801, THNHM –I–24805, THNHM –I–24806; major workers: THNHM –I–24802 (images examined), THNHM –I–24803, THNHM –I–24804 . Combination in Camponotus (Orthonotomyrmex): Jaitrong &amp; Jeenthong, 2022: 34.</p><p>Material examined.</p><p>China — Hainan Prov. • 1 minor worker; Diaoluoshan NNR; 27. v. 1999; J R. Fellowes leg.; MBS 013226; HKBM .</p><p>Laos — Bolikhamsai • 35 minor workers, 5 major workers; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.15129&amp;materialsCitation.latitude=18.42788" title="Search Plazi for locations around (long 103.15129/lat 18.42788)">Ban Hat Khay</a>; 18.427879°N, 103.151289°E; ± 20 m 2; 196 m a. s. l.; 26. xi. 2025; Hand coll.; B. Guénard leg.; Rub. Plant.; BG–PKK–02; IBBL • 1 minor worker; As previous; ANTWEB 1011158; IBBL • 1 major worker; As previous; ANTWEB 1011159; IBBL • 1 minor worker; As previous; ANTWEB 1011177; ZRC • 1 minor worker; As previous; ANTWEB 1011178; ZRC • 1 minor worker; As previous; ANTWEB 1011179; IBBL • 1 major worker; As previous; ANTWEB 1011180; ZRC • 1 minor worker; As previous; ANTWEB 1011181; ZRC • 1 major worker; As previous; ANTWEB 1011182; ZRC • 1 minor worker; As previous; ANTWEB 1011183; IBBL • 1 minor worker; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.15144&amp;materialsCitation.latitude=18.4299" title="Search Plazi for locations around (long 103.15144/lat 18.4299)">Ban Hat Khay</a>; 18.4299°N, 103.15144°E; ± 50 m 2; 192 m a. s. l.; 26. xi. 2025; Hand coll.; B. Guénard leg.; Rubber Plantation; BG–PKK–03, ANTWEB 1011184; IBBL • 1 minor worker; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.15&amp;materialsCitation.latitude=18.42" title="Search Plazi for locations around (long 103.15/lat 18.42)">Ban Hat Khay</a>; 18.42°N, 103.15°E; ± 1 km 2; 176 m a. s. l.; 26. xi. 2025; Hand coll.; B. Guénard leg.; Rubber Plantation; BG–PKK–13; ANTWEB 1011157; IBBL .</p><p>Distribution.</p><p>One minor worker was collected in Diaoluoshan Nature Reserve in Hainan Province, China in 1992, which presents a new record of the species in China and the northernmost record of this species so far.</p><p>Recently, more specimens were sampled in Bolikhamsai Province, Laos. The collection site was 248 km northwest of the where the type specimens were collected in Mukdahan Province, Thailand (Jaitrong and Jeenthong 2022). The discovery of this species also presents a new species record for the Lao People’s Democratic Republic.</p><p>Ecology.</p><p>A nest of 112 individuals consisting of 41 minor workers, eight major workers and 73 larvae were collected from a rather large dead bamboo stem (diameter 10–15 cm). The bamboo patch was growing along a dry river stream and was nested within a rubber plantation. No reproductives were observed or collected along with the nest. Several larvae of Microdon ( Diptera, Syrphidae) were also observed in the same bamboo stem.</p><p>Comments.</p><p>Three median workers were discovered within the colony collected from Laos (Fig. 7 B, E, H), which bear phragmotic heads with the shape and colour patterns similar to that of the major workers (Fig. 7 C, F, I). The pronotum is also similar to that of the major workers, while the slightly elevated propodeum is similar to that observed in the minor workers.</p><p>Upon closer examination of the specimens from Laos, there appears to be some regional variation compared to the type specimens from Thailand: both the minor and major workers collected in Laos are observed to have more distinct triangular humeral corners of the pronotum in dorsal view; in the minor workers, in particular, the anterolateral margins of the pronotum are strongly concave in dorsal view rather than weakly concave in the type specimens from Thailand; the promesonotal suture in some minor workers were weakly rounded in dorsal view, which are similar to that observed in C. orthogonius sp. nov. The shape of the humeral corners of the pronotum seem to be variable between minor and major workers from both localities (Jaitrong, personal communication, February 2026). Other than these differences, all other characters observed in the Laos specimens correspond to the description of C. siamensis provided by Jaitrong and Jeenthong (2022).</p></div>	https://treatment.plazi.org/id/5A13017713C059279F53F2278DCC6622	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Chan, Marco;Hamer, Matthew T.;Guénard, Benoit	Chan, Marco, Hamer, Matthew T., Guénard, Benoit (2026): A new species complex in the genus Camponotus Mayr, 1861 (Hymenoptera: Formicidae), with the description of a new species. Contributions to Entomology 76 (1): 139-158, DOI: 10.3897/contrib.entomol.76.e189240
