New records of snakes (Squamata: Serpentes) from Dien Dien province

Dung, Le Trung; Son, Nguyen Lan Hung; Pham, Cuong The; Truong, Nguyen Quang

doi:10.15625/0866-7160/v36n4.6175

Cited by 1 publication

(4 citation statements)

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“…Pareas carinatus — (in part) Smith, 1943 ; Taylor, 1965 ; Yang & Rao, 2008 ; Nguyen, Ho & Nguyen, 2009 ; Teynié & David, 2010 ; Le et al, 2014 ; Wallach, Williams & Boundy, 2014 ; Chan-ard, Parr & Nabhitabhata, 2015 ; Pham & Nguyen, 2019 .…”

Section: Resultsmentioning

confidence: 99%

“…Updated diagnosis: Pareas berdmorei differs from other members of the genus Pareas by the following combination of morphological characters: maximal total length of 770 mm; frontal scale hexagonal with its lateral sides parallel to the body axis; the anterior pair of chin shields broader than long; loreal and prefrontal not contacting the eye; generally 1 or 2 preoculars; regularly 2 (rarely 1 or 3) suboculars; generally single postocular (rarely 0 or 2); temporals 3 + 4 or 3 + 3; one to three median vertebral dorsal scale rows slightly enlarged; generally 8 (7–9) infralabials; 15 dorsal scale rows, of them 3–13 scale rows at midbody feebly keeled; 162–187 ventrals; 57–89 subcaudals, all divided; dorsum yellow-brown to orange, dark markings on dorsum variable; thin upper postorbital stripes continue to nape often forming elongated dark markings; iris uniform, color varies from beige to bright reddish-orange ( Theobald, 1868b ; Bourret, 1934 ; Taylor, 1965 ; Ziegler et al, 2006 ; Yang & Rao, 2008 ; Le et al, 2014 ; Pham & Nguyen, 2019 ; Wang et al, 2020 ; our data).…”

Section: Resultsmentioning

confidence: 99%

“…Material examined: In this study we used morphological data from 38 specimens of P. berdmorei , including the 21specimens examined directly (among them the lectotype of Pareas berdmorei Theobald and the holotype of Amblycephalus carinatus unicolor Bourret) and the published data for 17 specimens formerly listed as “ P. carinatus ” ( Taylor, 1965 ; Ziegler et al, 2006 ; Yang & Rao, 2008 ; Le et al, 2014 ; and Pham & Nguyen, 2019 ), and “ P. menglaensis ” ( Wang et al, 2020 ) ( Table S11 ).…”

Section: Resultsmentioning

confidence: 99%

“…Pareas carinatus — (in part) Ziegler et al, 2006 , 2016; Nguyen, Ho & Nguyen, 2009 ; Teynié & David, 2010 ; Le et al, 2014 ; Pham & Nguyen, 2019 .…”

Section: Resultsmentioning

confidence: 99%

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An integrative taxonomic revision of slug-eating snakes (Squamata: Pareidae: Pareineae) reveals unprecedented diversity in Indochina

Poyarkov

Nguyen

Pawangkhanant

et al. 2022

PeerJ

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Slug-eating snakes of the subfamily Pareinae are an insufficiently studied group of snakes specialized in feeding on terrestrial mollusks. Currently Pareinae encompass three genera with 34 species distributed across the Oriental biogeographic region. Despite the recent significant progress in understanding of Pareinae diversity, the subfamily remains taxonomically challenging. Here we present an updated phylogeny of the subfamily with a comprehensive taxon sampling including 30 currently recognized Pareinae species and several previously unknown candidate species and lineages. Phylogenetic analyses of mtDNA and nuDNA data supported the monophyly of the three genera Asthenodipsas, Aplopeltura, and Pareas. Within both Asthenodipsas and Pareas our analyses recovered deep differentiation with each genus being represented by two morphologically diagnosable clades, which we treat as subgenera. We further apply an integrative taxonomic approach, including analyses of molecular and morphological data, along with examination of available type materials, to address the longstanding taxonomic questions of the subgenus Pareas, and reveal the high level of hidden diversity of these snakes in Indochina. We restrict the distribution of P. carinatus to southern Southeast Asia, and recognize two subspecies within it, including one new subspecies proposed for the populations from Thailand and Myanmar. We further revalidate P. berdmorei, synonymize P. menglaensis with P. berdmorei, and recognize three subspecies within this taxon, including the new subspecies erected for the populations from Laos and Vietnam. Furthermore, we describe two new species of Pareas from Vietnam: one belonging to the P. carinatus group from southern Vietnam, and a new member of the P. nuchalis group from the central Vietnam. We provide new data on P. temporalis, and report on a significant range extension for P. nuchalis. Our phylogeny, along with molecular clock and ancestral area analyses, reveal a complex diversification pattern of Pareinae involving a high degree of sympatry of widespread and endemic species. Our analyses support the “upstream” colonization hypothesis and, thus, the Pareinae appears to have originated in Sundaland during the middle Eocene and then colonized mainland Asia in early Oligocene. Sundaland and Eastern Indochina appear to have played the key roles as the centers of Pareinae diversification. Our results reveal that both vicariance and dispersal are responsible for current distribution patterns of Pareinae, with tectonic movements, orogeny and paleoclimatic shifts being the probable drivers of diversification. Our study brings the total number of Pareidae species to 41 and further highlights the importance of comprehensive taxonomic revisions not only for the better understanding of biodiversity and its evolution, but also for the elaboration of adequate conservation actions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Pareas carinatus — (in part) Ziegler et al, 2006 , 2016; Nguyen, Ho & Nguyen, 2009 ; Teynié & David, 2010 ; Le et al, 2014 ; Pham & Nguyen, 2019 .…”

Section: Resultsmentioning

confidence: 99%

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