An integrative taxonomic revision of the Trimeresurus popeiorum group of pitvipers (Reptilia: Serpentes: Viperidae) with descriptions of two new species from the Indo-Burma Biodiversity Hotspot

Vertebrate Zoology, Journal Year: 2024, Volume and Issue: 74, P. 303 - 342

Published: April 4, 2024

Abstract Despite recent progress in our understanding of diversity within the genus Trimeresurus Lacépède, 1804, subgenus Popeia Malhotra & Thorpe, 2004, distributed across most parts East and Southeast Asia, remains taxonomically challenging. We applied an integrative taxonomic approach including analyses morphological data four mitochondrial genes (12S 16S rRNA, cytochrome b , NADH dehydrogenase subunit 4), along with examination available type material, to address longstanding questions one clade T. popeiorum group, reveal a high level hidden these snakes Indo-Burma Biodiversity Hotspot. confirm that Smith, 1937 sensu stricto is restricted Northeast India, eastern Nepal, southern Bhutan, southeastern Bangladesh, western Yunnan Province (China), northern southwestern Myanmar. further recently described species yingjiangensis Chen et al., 2019 junior synonym . In addition, we discovered combination Trimesurus [sic] elegans Gray, 1853 valid senior threatens stability latter taxon. Therefore, order protect nomen accordance Article 23.9 International Code Zoological Nomenclature, regard taxon as oblitum render protectum. Examination larger series specimens allows us describe two new cryptic from Region. This study brings total number six also suggests subspecific taxonomy sabahi complex requires investigation. urge adequate actions regarding conservation newly recommend studies on their toxicology.

Language: Английский

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A new species of karst-associated kukri snake (Reptilia: Squamata: Colubridae: Oligodon Fitzinger, 1826) from southern Thailand

Vertebrate Zoology, Journal Year: 2024, Volume and Issue: 74, P. 359 - 379

Published: April 26, 2024

Abstract We describe a new species of kukri snake ( Oligodon Fitzinger, 1826) from the limestone karst formations Satun and Trang Provinces in southern Thailand. Phylogenetic analyses based on three mitochondrial DNA fragments (12S–16S ribosomal rRNA cytochrome b ) recover within cinereus complex, where it forms deeply divergent yet poorly supported clade sister to saiyok Sumontha et al., 2017 another unnamed lineage currently referred (Günther, 1864) southwest Myanmar. Morphologically, is distinguished all other members genus by following combination characters: ventral scales 189–193 with distinct lateral keeling; subcaudal 47–54, paired; anterior dorsal scale rows 17–19, reduction 19 17 occurring above 28 th –30 when present; maxillary teeth 8, blade-like laterally compressed; dorsum olive–gray, plain; surface white anteriorly, dark gray posteriorly; underside tail gray, smeared white. briefly discuss natural history conservation status this provide observations snakes inhabiting habitats. Our study also incorporates genetic samples four recently described endemic Thailand, which are recovered O. complex. In agreement previous studies, we demonstrate that species-level diversity complex underestimated, additional sampling necessary revise taxonomically challenging clade.

Language: Английский

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A new species in the Cyrtodactylus intermedius (Squamata: Gekkonidae) group from an isolated limestone karst formation in southwestern Cambodia

Zootaxa, Journal Year: 2024, Volume and Issue: 5474(1), P. 1 - 20

Published: June 24, 2024

The gekkonid lizard Cyrtodactylus intermedius was formerly considered to be a single widespread species in hilly areas across eastern Thailand through southern Vietnam but has recently been partitioned into complex of 12 nominal its range. A population belonging the C. group found an isolated limestone karst block Kampot Province southwestern Cambodia, part which lies within designated Phnom Preah Kuhear Loung Natural Heritage Site. Comparisons morphometric, meristic, qualitative morphological and color pattern data, as well molecular analysis using mitochondrial ND2 gene, revealed that this differs from all other named members group, so is described here new species. karst-dwelling regicavernicolus sp. nov. recovered sister laangensis, most geographically proximate member one also restricted small habitat.

Language: Английский

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A new species of the Cyrtodactylus brevipalmatus group (Squamata: Gekkonidae) from Phuket Island, Thailand with a discussion of the group’s potential biogeography

Zootaxa, Journal Year: 2024, Volume and Issue: 5437(2), P. 193 - 222

Published: April 11, 2024

Model based integrative analyses supports the recognition of a new species Cyrtodactylus brevipalmatus group from Phuket Island, Thailand. thalang sp. nov. is most closely related to sister C. Thai-Malay Peninsula and cf. Langkawi Kedah State, Peninsular Malaysia. Based on mitochondrial gene ND2, bears an uncorrected pairwise sequence divergence 14.7% 15.1% brevipalmatus, respectively, significantly different (p<0.05) mean values meristic morphometric characters, discrete categorical morphological differences. A multiple factor analysis morphospatially statistically placed well outside all other group. The BAYAREALIKE model BioGeoBEARS indicated origin was in western Indochina with subsequent south north speciation along Tenasserim Mountains followed by west east invasion northern Thailand, Laos, northwestern Vietnam northeast Chao Phraya Basin Khorat Plateau.

Language: Английский

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A new species of karst-dwelling bent-toed gecko of the Cyrtodactylus intermedius group (Squamata, Gekkonidae) from eastern Thailand and the phylogenetic placement of C. intermedius

ZooKeys, Journal Year: 2024, Volume and Issue: 1211, P. 101 - 130

Published: Sept. 3, 2024

A new karst-dwelling bent-toed gecko of the Cyrtodactylus intermedius group is described from Khlong Hat District, Sa Kaeo Province, eastern Thailand, based on an integrative taxonomic analysis genetic data and morphological characteristics. Phylogenetic analyses using mitochondrial NADH dehydrogenase subunit 2 (ND2) gene revealed that topotypes C. were sister to a clade containing kulenensis Cambodia, unnamed lineage Sakaerat Biosphere Reserve in Nakhon Ratchasima here as khlonghatensis sp. nov. Multivariate morphometric meristic characters showed morphologically distinct all other species by having combination SVL 76.5–82.8 mm adult males 88.5 female; eight supralabial nine infralabial scales; 30–32 paravertebral tubercles; 20 or 21 longitudinal rows dorsal 43 44 ventral seven expanded subdigital lamellae 4 th toe; 12 unmodified 19 total 31 32 number enlarged femoral precloacal scales continuous; 6–8 pore-bearing males; three four post-precloacal 1–3 postcloacal proximal less than one-half size distal absence interdigital pocketing between digits forefeet hindfeet; posterior border nuchal loop rounded. Uncorrected pairwise divergences ( p -distances) ranged 4.73–22.55%. The discovery this exclusively isolated karst formations Thai-Cambodia suggests there may be further undiscovered unexplored landscapes along Thailand western Cambodia.

Language: Английский

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Two new cave-dwelling species of Bent-toed Geckos from Saraburi and Loei provinces, Thailand (Squamata: Gekkonidae: Cyrtodactylus)

Zootaxa, Journal Year: 2024, Volume and Issue: 5512(2), P. 272 - 294

Published: Sept. 19, 2024

We describe Cyrtodactylus meesookae sp. nov. from a cave on Khao Nam Phu (14°34’33.2”N, 101°08’42.6”E), limestone hill in Saraburi Province, central Thailand, and C. wiboonatthapoli (previously confused with papilionoides) Pha Sana (17°10’33.8”N 101°57’52.5”E), Loei northeastern Thailand. These two micro-endemic, trogloxene species, separated by distance of about 300 airline km, share typical habitus for limestone-dwelling species relatively similar dorsal pattern, but they are readily distinguished scalation characters.

Language: Английский

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Cyrtodactylus panitvongi, a new cave-dwelling Bent-toed Gecko from Lopburi Province, central Thailand (Squamata: Gekkonidae)

Zootaxa, Journal Year: 2024, Volume and Issue: 5512(3), P. 373 - 388

Published: Sept. 20, 2024

We describe Cyrtodactylus panitvongi sp. nov. from Tham Khao Chan (14°58’42.2”N 101°18’40.6”E), a limestone cave in Lopburi Province, central Thailand. The new species is characterized by the following combination of morphological characters and pattern: maximal known snout-vent length 85 mm, 15–18 interorbital scales, 35–37 interciliary 10–12 supralabials, 9–11 infralabials, 29–33 paravertebral tubercles which 22–25 between limb insertions, 18 longitudinal rows dorsal at midbody, 40–42 ventral scale poorly defined, non-denticulate ventrolateral folds, series 13 or 14 enlarged femoroprecloacal scales including 2 pores on proximalmost each side separated single smaller medial males, six precloacal pits continuous 32–34 females, no groove depression, two three postcloacal spurs base tail males interdigital webbing, 16–19 total subdigital lamellae 4th toe, row widened median subcaudal plates, banded pattern an uninterrupted nuchal collar dark bands dorsum, 10 11 dark-colored rings original tail, golden iris. This trogloxene added to long list squamates endemic Saraburi Group Limestones.

Language: Английский

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A New Species of Cyrtodactylus tibetanus Group (Reptilia: Squamata: Gekkonidae) from Xizang Autonomous Region, China

Animals, Journal Year: 2024, Volume and Issue: 14(16), P. 2384 - 2384

Published: Aug. 17, 2024

A new

Language: Английский

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Additions to the herpetofauna of Hon Son Island, Rach Gia Bay, Kien Giang Province, southern Vietnam with a discussion of syntopy between the granite cave-adapted Bent-toed Gecko Cyrtodactylus eisenmanae and a new Cyrtodactylus of uncertain taxonomic status

Zootaxa, Journal Year: 2023, Volume and Issue: 5346(3), P. 307 - 316

Published: Sept. 18, 2023

An updated herpetofaunal checklist of Hon Son Island, Rach Gia Bay, Kien Giang Province, southern Vietnam is presented which reports new records for Kaloula pulchra, Sylvirana cf. mortenseni, Cyrtodactylus sp., and Gehyra mutilata bringing the island total to 21 species. sp. an unidentified granite-cave adapted species that occurs in syntopy with C. eisenmanae, number on this tiny (11.5 km2) three. The implications highly specialized syntopic congeneric ecomorphs discussed.

Language: Английский

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A New Species of the Cyrtodactylus pulchellus Group (Squamata: Gekkonidae) from Surat Thani Province, Thailand Underscores This Group’s Remarkable Diversity on the Thai-Malay Peninsula

Animals, Journal Year: 2024, Volume and Issue: 14(22), P. 3226 - 3226

Published: Nov. 11, 2024

An integrative taxonomic study recognized a new species of the

Language: Английский

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