المؤلفون: Parinya Pawangkhanant, Nikolay A. Poyarkov, Harry Ward-Smith, Rupert Grassby-Lewis, Montri Sumontha, Nikita S. Kliukin, Sabira S. Idiiatullina, Alexei V. Trofimets, Chatmongkon Suwannapoom, Justin L. Lee

المصدر: Vertebrate Zoology, Vol 74, Iss , Pp 359-379 (2024)

مصطلحات موضوعية: Zoology, QL1-991

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

وصف الملف: electronic resource

Relation: https://vertebrate-zoology.arphahub.com/article/112132/download/pdf/; https://vertebrate-zoology.arphahub.com/article/112132/download/xml/; https://vertebrate-zoology.arphahub.com/article/112132/; https://doaj.org/toc/2625-8498

URL الوصول: https://doaj.org/article/8e4bef77cf4c4c5ab90c8e767e44286a

المؤلفون: Sabira S. Idiiatullina, Tan Van Nguyen, Parinya Pawangkhanant, Chatmongkon Suwannapoom, Lawan Chanhome, Zeeshan A. Mirza, Patrick David, Gernot Vogel, Nikolay A. Poyarkov

المصدر: Vertebrate Zoology, Vol 74, Iss , Pp 303-342 (2024)

مصطلحات موضوعية: Zoology, QL1-991

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

وصف الملف: electronic resource

Relation: https://vertebrate-zoology.arphahub.com/article/113347/download/pdf/; https://vertebrate-zoology.arphahub.com/article/113347/download/xml/; https://vertebrate-zoology.arphahub.com/article/113347/; https://doaj.org/toc/2625-8498

URL الوصول: https://doaj.org/article/0acb000868bb414896fc1d6972a2d8a8

المؤلفون: Sabira S. Idiiatullina, Parinya Pawangkhanant, Chatmongkon Suwannapoom, Tanapong Tawan, Lawan Chanhome, Tan Van Nguyen, Patrick David, Gernot Vogel, Nikolay A. Poyarkov

المصدر: European Journal of Taxonomy, Vol 930, Iss 1 (2024)

مصطلحات موضوعية: Crotalinae, T. kanburiensis complex, Peninsular Thailand, karst, taxonomy, Zoology, QL1-991, Botany, QK1-989

الوصف: We describe a new species of karst-dwelling pitviper from Chumphon Province of Peninsular Thailand, in the Isthmus of Kra, based on morphological and molecular data (2427 bp from cyt b, ND4 and 16S rRNA mitochondrial DNA genes). Morphologically, Trimeresurus kraensis sp. nov. is distinguished from other congeners by the following combination of morphological characters: a dark/bottle-green dorsum with reddish-brown or purple crossbands; pale green venter lacking dark dots; stripes present on the lateral sides of the ventrals; internasals generally in contact; one large supraocular scale on each side of the head; iris pale copper; tail brown with dark purplish-brown crossbars; dorsal scales in 21–21–15 rows; ventral scales 167 in a single male, 169–171 in females; subcaudal scales 62 in a single male, 52–54 in females, all paired. White vertebral spots present in males, located on approximately every two or four dorsal scales; dark brown spots forming discontinuous pattern present on 1–3 lateral dorsal scale rows; males with reddish-brown postocular stripe with jagged edges. The new species differs from the morphologically similar species Trimeresurus venustus s. str. by a notable divergence in cytochrome b mitochondrial DNA gene sequences (p = 5.9%).

وصف الملف: electronic resource

Relation: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/2489; https://doaj.org/toc/2118-9773

URL الوصول: https://doaj.org/article/281dca32c3ed4435a1dbd154d88d278f

المؤلفون: Sabira S. Idiiatullina, Parinya Pawangkhanant, Tanapong Tawan, Thanawut Worranuch, Bunyarit Dechochai, Chatmongkon Suwannapoom, Tan Van Nguyen, Lawan Chanhome, Nikolay A. Poyarkov

المصدر: Vertebrate Zoology, Vol 73, Iss , Pp 697-716 (2023)

مصطلحات موضوعية: Zoology, QL1-991

الوصف: Abstract We describe a new species of pitvipers from Trang Province of Thailand, near the Thailand–Malaysian border, based on morphological and molecular (2427 bp from cyt b, ND4, and 16S rRNA mitochondrial DNA genes) lines of evidence. Morphologically, Trimeresurus ciliaris sp. nov. is distinguished from its congeners by the following combination of morphological characters: a long papillose hemipenis; first supralabial and nasal scale fused; three to four small supraocular scales; internasals not in contact; small scale between nasal and the scale formed by the fused second supralabial and loreal present; dorsal scales in 17–17–15 rows across the body; ventral scales 172–175 in males, 171 in female; subcaudal scales 59–63 in males, 61 in female, all paired; in life an emerald-green dorsum with reddish-brown bands; creamy-white venter lacking dark dots or stripes on the lateral sides of the ventrals; white vertebral spots present in both sexes on every two or three dorsal scales; dark brown spots forming discontinuous pattern present on 1–3 lateral dorsal scale rows; males with reddish-brown postocular stripe. The new species forms a distinct clade on the phylogenetic tree of the genus Trimeresurus and differs from the morphologically similar species T. venustus by a significant divergence in cytochrome b mitochondrial DNA gene sequences (p = 12.5%). The new species is currently known from a small karstic area in the Nakawan Range spanning the border of Thailand and Malaysia, in particular in limestone forests in Trang and Satun provinces (Thailand); it likely also occurs in the adjacent parts of Perlis State (Malaysia). Our study also suggests that the taxonomy of T. kanburiensis species complex requires further studies; in particular our study suggests that the status of populations from Chumphon Province of Thailand and Pulau Langkawi Island of Malaysia should be re-assessed.

وصف الملف: electronic resource

Relation: https://vertebrate-zoology.arphahub.com/article/109854/download/pdf/; https://vertebrate-zoology.arphahub.com/article/109854/download/xml/; https://vertebrate-zoology.arphahub.com/article/109854/; https://doaj.org/toc/2625-8498

URL الوصول: https://doaj.org/article/849518101fb048db99ab675028139e48

المؤلفون: Sitthivong S; Faculty of Forestry, National University of Laos, Vientiane 01170, Lao PDR., Brakels P; IUCN Laos PDR, Vientiane 01160, Lao PDR., Xayyasith S; Faculty of Environmental Sciences, National University of Laos, Vientiane 01170, Lao PDR., Maury N; Chelonian Conservation Center Laos, World Encyclopedia of Herpetofauna, Vientiane 01000, Lao PDR., Idiiatullina S; Department of Vertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Moscow 119234, Russia., Pawangkhanant P; Rabbit in the Moon Foundation (RIM), Suanphueng, Ratchaburi 70180, Thailand., Wang K; State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China.; Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences, Yezin , Nay Pyi Taw 05282, Myanmar. E-mail: wangkai@mail.kiz.ac.cn., Nguyen TV; Institute for Research and Training in Medicine, Biology and Pharmacy, Duy Tan University, Da Nang 550000, Vietnam.; College of Medicine & Pharmacy, Duy Tan University, Da Nang 550000, Vietnam. E-mail: tan.sifasv@gmail.com., Poyarkov NA; Department of Vertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Moscow 119234, Russia.; Joint Russian-Vietnamese Tropical Research and Technological Center, Nghia Do, Cau Giay, Hanoi 122000, Vietnam. E-mail: n.poyarkov@gmail.com.

المصدر: Zoological research [Zool Res] 2023 Nov 18; Vol. 44 (6), pp. 1039-1051.

نوع المنشور: Journal Article

بيانات الدورية: Publisher: Science Press Country of Publication: China NLM ID: 101697192 Publication Model: Print Cited Medium: Internet ISSN: 2095-8137 (Print) Linking ISSN: 20958137 NLM ISO Abbreviation: Zool Res Subsets: MEDLINE

مواضيع طبية MeSH: Lizards*/anatomy & histology, Male ; Animals ; Laos ; Phylogeny ; RNA, Ribosomal, 16S ; Snakes/genetics ; Calcium Carbonate

مستخلص: We describe a unique new species and genus of agamid lizard from the karstic massifs of Khammouan Province, central Laos. Laodracon carsticola Gen. et sp. nov. is an elusive medium-sized lizard (maximum snout-vent length 101 mm) specifically adapted to life on limestone rocks and pinnacles. To assess the phylogenetic position of the new genus amongst other agamids, we generated DNA sequences from two mitochondrial gene fragments (16S rRNA and ND 2) and three nuclear loci ( BDNF , RAG1 and c-mos ), with a final alignment comprising 7 418 base pairs for 64 agamid species. Phylogenetic analyses unambiguously place the new genus in the mainland Asia subfamily Draconinae, where it forms a clade sister to the genus Diploderma from East Asia and the northern part of Southeast Asia. Morphologically, the new genus is distinguished from all other genera in Draconinae by possessing a notably swollen tail base with enlarged scales on its dorsal and ventral surfaces. Our work provides further evidence that limestone regions of Indochina represent unique "arks of biodiversity" and harbor numerous relict lineages. To date, Laodracon carsticola Gen. et sp. nov. is known from only two adult male specimens and its distribution seems to be restricted to a narrow limestone massif on the border of Khammouan and Bolikhamxai provinces of Laos. Additional studies are required to understand its life history, distribution, and conservation status.