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| Orthomorpha tergoaurantia; O. efefai; O. battambangiensis Likhitrakarn, in Likhitrakarn, Golovatch, Thi, Sophea, Lou, Sinovas, Jeratthitikul, Pholyotha, Siriwut, Srisonchai, Panha et Sutcharit, 2025. |
Abstract
The Southeast Asian millipede genus Orthomorpha Bollman, 1893 currently encompasses 59 accepted species, including three newly described from Cambodia: Orthomorpha tergoaurantia Likhitrakarn, sp. nov., Orthomorpha efefai Likhitrakarn, sp. nov., and Orthomorpha battambangiensis Likhitrakarn, sp. nov. The new species are described based on distinctive morphological traits, with particular emphasis on gonopodal features. Species descriptions are accompanied by detailed illustrations and scanning electron micrographs (SEM) of the gonopods. An updated identification key to the known Orthomorpha species from Cambodia is also provided.
Key words: Asiomorpha, catalogue, distribution, key, morphology, Orthomorphini, taxonomy
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| Orthomorpha tergoaurantia Likhitrakarn, sp. nov., habitus, live coloration. A. ♂ Paratype from Phnom Cheal Pagoda; B. ♀ Paratype from Phnom Chhngok Cave Temple; C. ♂ holotype from Prasat Phnom Totong Temple. |
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| Habitus, live coloration. A, B. Orthomorpha efefai Likhitrakarn, sp. nov.; A. ♂ holotype; B. ♂ holotype (above) and ♀ paratype from Neang Romsay Sak Cave; C, D. Orthomorpha battambangiensis Likhitrakarn, sp. nov.; C. ♂ paratype; D. ♂ (above), ♀ paratypes from Phnom Kdoang Sampov. |
Natdanai Likhitrakarn, Sergei I. Golovatch, Sothearen Thi, Chhin Sophea, Vanny Lou, Pablo Sinovas, Ekgachai Jeratthitikul, Arthit Pholyotha, Warut Siriwut, Ruttapon Srisonchai, Somsak Panha and Chirasak Sutcharit. 2025. Review of the Millipede Genus Orthomorpha Bollman, 1893 (Diplopoda, Polydesmida, Paradoxosomatidae) in Cambodia, with New Records and Descriptions of Three New Species. ZooKeys. 1251: 251-274. DOI: doi.org/10.3897/zookeys.1251.158776
