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Issue: Vol. 5752 No. 2: 26 Jan. 2026
Type: Article
Published: 2026-01-26
DOI: 10.11646/zootaxa.5752.1.5
Page range: 105-133
Abstract views: 38
PDF downloaded: 0

Rediscovery and revalidation of Calamaria annamensis Bourret, 1937 (Squamata: Calamariidae), a rare reed snake restricted to the Truong Son Range of central Vietnam

Department of Vertebrate Zoology; Lomonosov Moscow State University; Leninskiye Gory; GSP–1; Moscow 119234; Russia
Joint Vietnam-Russia Tropical Science and Technology Research Center; Nghia Do; Hanoi; Vietnam
Department of Vertebrate Zoology; Lomonosov Moscow State University; Leninskiye Gory; GSP–1; Moscow 119234; Russia
Joint Vietnam-Russia Tropical Science and Technology Research Center; Nghia Do; Hanoi; Vietnam
Department of Vertebrate Zoology; Lomonosov Moscow State University; Leninskiye Gory; GSP–1; Moscow 119234; Russia
State Key Laboratory of Plateau Ecology and Agriculture; Qinghai University; Xining; China
Anhui Province Key Laboratory of the Conservation and Exploitation of Biological Resource; College of Life Sciences; Anhui Normal University; Wuhu; China
Museum of Vertebrate Zoology; University of California; Berkeley; CA 94720-3160; U.S.A.
Institut de Systématique; Évolution et Biodiversité (ISYEB); Muséum National d’Histoire Naturelle; Sorbonne Université; École Pratique des Hautes Études; Université des Antilles; CNRS; CP 30; 57 rue Cuvier; F-75005 Paris; France
The School of Medicine & Pharmacy; Duy Tan University; Da Nang; 550000; Vietnam; Center for Entomology & Parasitology Research; Duy Tan University; Da Nang; 550000; Vietnam
Department of Vertebrate Zoology; Lomonosov Moscow State University; Leninskiye Gory; GSP–1; Moscow 119234; Russia; Joint Vietnam-Russia Tropical Science and Technology Research Center; Nghia Do; Hanoi; Vietnam
Reptilia Calamaria pavimentata complex morphology phylogenetics Indo-Burma region endemism

Abstract

The reed snakes of the genus Calamaria H. Boie in F. Boie are among the least-studied Southeast Asian snakes, with several taxa known only from their original description. Calamaria pavimentata annamensis Bourret, 1937, described from “Dong Tam Ve (province de Quang-tri), Annam”, now Bac Huong Hoa Nature Reserve, Quang Tri Province, Vietnam, based solely on a single specimen. This taxon was subsequently treated as a junior synonym of C. pavimentata Duméril, Bibron & Duméril, for example by Smith (1943) and Inger & Marx (1965), without any comprehensive reassessment to date. Here, we report the rediscovery of this taxon based on three newly collected specimens from the type locality and revalidate it as Calamaria annamensis stat. nov., based on integrative morphological and mitochondrial DNA analyses. We established detailed morphological comparisons to specimens of C. pavimentata alleged to originate from Java Island, Indonesia (type locality), and from Guangxi Province, China (as defined by Yeung et al. 2022), and other congeners from mainland Southeast Asia. Mitochondrial DNA (cytochrome b) analysis supports the distinctiveness of Calamaria annamensis stat. nov., revealing an uncorrected p-distance of 19.4% from C. pavimentata and ranging from 16.7% (C. nebulosa Lee) to 21.5% (C. lumbricoidea Boie) when compared with other congeners. This revalidation increases the number of Calamaria species to 71, of which twelve are currently recorded from Vietnam. Our findings also underscore the urgent need for comprehensive taxonomic and molecular studies on the widely distributed Calamaria pavimentata and C. septentrionalis Boulenger species complexes in Vietnam to resolve their true diversity and distribution.

 

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How to Cite

Korolev, A.M., Bragin, A.M., Gorin, V.A., Le, S.X., Idiiatullina, S.S., Xu, Y., Zhang, T., Bos, C., David, P., Nguyen, T.V. & Poyarkov, N.A. (2026) Rediscovery and revalidation of Calamaria annamensis Bourret, 1937 (Squamata: Calamariidae), a rare reed snake restricted to the Truong Son Range of central Vietnam. Zootaxa, 5752 (2), 105–133. https://doi.org/10.11646/zootaxa.5752.1.5