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Issue: Vol. 5569 No. 2: 14 Jan. 2025
Type: Article
Published: 2025-01-14
DOI: 10.11646/zootaxa.5569.2.3
Page range: 253-281
Abstract views: 401
PDF downloaded: 11

A new species of lowland karst-dwelling Slender Gecko Hemiphyllodactylus Bleeker, 1860 (Squamata: Gekkonidae) from a karstic archipelago in western Cambodia

Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92505; USA; Department of Herpetology; San Diego Natural History Museum; PO Box 121390; San Diego; California; 92112; USA.; Institute for Tropical Biology and Conservation; Universiti Malaysia Sabah; Jalan UMS; 88400; Kota Kinabalu; Malaysia.
Fauna & Flora Cambodia Programme; 19 Street 360; Phnom Penh; Cambodia
Institute for Tropical Biology and Conservation; Universiti Malaysia Sabah; Jalan UMS; 88400; Kota Kinabalu; Malaysia; Lee Kong Chian Natural History Museum; National University of Singapore; 2 Conservatory Drive; 117377; Singapore.; School of Biological Sciences; Universiti Sains Malaysia; 11800 Minden; Penang; Malaysia.
Fauna & Flora Cambodia Programme; 19 Street 360; Phnom Penh; Cambodia
Fauna & Flora Cambodia Programme; 19 Street 360; Phnom Penh; Cambodia
Department of Biodiversity; General Directorate of Policy and Strategy; Ministry of Environment; Cambodia
Department of Agronomy; Faculty of Agriculture and Food Processing; National Meanchey University; Krong Serei Sophaon; Banteay Meanchey Province; Cambodia
Department of Evolution; Ecology; and Organismal Biology; University of California; Riverside; CA 92521
Zoologisches Forschungsmuseum Alexander Koenig; Adenauerallee 160; D-53113 Bonn; Germany; Museum Natur und Mensch; Gerberau 32; D-79098 Freiburg; Germany.
Department of Life Sciences; Natural History Museum London; Cromwell Road; London SW7 5BD; UK
Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92505; USA
Reptilia conservation Gekkota genetics integrative taxonomy limestone phylogeny Southeast Asia

Abstract

A new species of gekkonid lizard is described from Phnom Khpoh, an isolated karstic hill within an extensive karstic archipelago in Battambang Province, western Cambodia. Phylogenetic analysis using a 1041 base pair fragment of the mitochondrial gene ND2 recovered Hemiphyllodactylus khpoh sp. nov. as the sister species of H. pardalis, found 335 km to the west in southern Thailand. Analyses of meristic, morphometric, and categorical characters of morphology and color pattern differentiated H. khpoh sp. nov. from both the morphologically distinct H. pardalis and the very similar Hemiphyllodactylus sp. from Phnom Kulen, approximately 130 km to the northeast in Siem Reap Province. The statistical morphological analyses and comparisons also showed that H. khpoh sp. nov. is well-differentiated from the recently described H. bokor and H. samkos from the nearby Cardamom Mountains as well from species in clade 6—a recently designated lineage from China, Laos, and Vietnam to which H. khpoh sp. nov. + H. pardalis compose the sister lineage. The discovery of H. khpoh sp. nov. highlights the rich but understudied biodiversity of karstic landscapes, emphasizing the need for continued research in the extensive unexplored karstic archipelago of western Cambodia. This region is poised to reveal unparalleled gekkonid diversity, comparable to that observed in the similarly sized karstic archipelago of the Salween Basin in southern Myanmar. Although karstic landscapes are proving to be some of the most biodiverse habitats on the planet, less than 1% of them are afforded any formal protection.

 

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