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Issue: Vol. 5653 No. 4: 30 Jun. 2025
Type: Article
Published: 2025-06-30
DOI: 10.11646/zootaxa.5653.4.3
Page range: 501-523
Abstract views: 225
PDF downloaded: 9

A new species of Dixonius Bauer, Good, & Branch, 1997 (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
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; USA
Department of Life Sciences; Natural History Museum London; Cromwell Road; London SW7 5BD; United Kingdom
Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92505; USA
Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92505; USA
Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92505; USA
Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92505; USA
Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92505; USA
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

An integrative taxonomic analysis was used to delimit and diagnose a new species of Dixonius from a karstic archipelago in western Cambodia. Dixonius noctivagus sp. nov. was recovered as the sister species to an undescribed species from eastern Cambodia and southwestern Vietnam based on 1,396 bp of the mitochondrial ND2 gene. A statistically robust diagnosis was established through multivariate and univariate analyses of morphometric, meristic, and categorical color pattern characters separating D. noctivagus sp. nov. from all other congeners. Although Dixonius is a common and widespread genus, the description herein brings the total number of Dixonius in Cambodia to two—far fewer than the eight species from both neighboring Thailand and Vietnam. This disparity underscores the need for systematic biodiversity surveys in the many understudied regions of Cambodia, particularly focusing on its herpetofauna. The discovery of D. noctivagus sp. nov. alongside recently described Cyrtodactylus and Hemiphyllodactyus species from the same karst formations highlights the urgent need for legal protection of these fragile habitats in the region.

 

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How to Cite

Grismer, L.L., Sinovas, P., Quah, E.S.H., Thi, S., Chourn, P., Chhin, S., Hun, S., Cobos, A., Ching, C., Murdoch, M.L., Gregory, J.J., Nguyen, E., Hernandez, A.P., Kaatz, A. & Grismer, J.L. (2025) A new species of Dixonius Bauer, Good, & Branch, 1997 (Squamata: Gekkonidae) from a karstic archipelago in Western Cambodia. Zootaxa, 5653 (4), 501–523. https://doi.org/10.11646/zootaxa.5653.4.3