A new species of the Kukri snake genus Oligodon is described from Medog County in the eastern Himalayas of China. The species, named Oligodon zhangfujii sp. nov., can be distinguished from all known congeners by a com...A new species of the Kukri snake genus Oligodon is described from Medog County in the eastern Himalayas of China. The species, named Oligodon zhangfujii sp. nov., can be distinguished from all known congeners by a combination of the following morphological characteristics:(1) 17-17-15 dorsal scale rows;(2) six supralabials, third and fourth entering orbit;(3) one loreal present;(4)seven infralabials, first to fourth in contact with anterior chin shields;(5) 173 ventral scales and 47 pairs of subcaudal scales;(6) cloacal plate divided;(7) hemipenis single, shallowly bilobed, with large calcareous spines and a calyx area, sulcus spermaticus single;and(8) eight maxillary teeth.Phylogenetic analyses based on two mitochondrial genes revealed that this species occupies an independent phylogenetic position, distinct from the eight recognized species groups within the genus, and represents a sister taxon to the clade comprising the O. theobaldi and O. cinereus groups.The description is based on a single road-killed individual. As such, ecological data for the species remain sparse, underscoring the need for additional field surveys across the eastern Himalayan region.展开更多
The South and Southeast Asian snake genus Oligodon, known for its egg-eating feeding behavior, has been a taxonomically and systematically challenging group. This work provides the first phylogenetic hypothesis for th...The South and Southeast Asian snake genus Oligodon, known for its egg-eating feeding behavior, has been a taxonomically and systematically challenging group. This work provides the first phylogenetic hypothesis for the genus. We use approximately 1900 base pairs of mitochondrial DNA sequence data to infer the relationships of these snakes, and we examine congruence between the phylogeny and hemipenial characters. A hypothesis for the position of Oligodon within the Colubridae is also proposed. We discuss the implications of the phylogeny for previous taxonomic groupings, and consider the usefulness of the trees in analysis of behavior and biogeography of this genus.展开更多
On the basis of a different dorsal pattern,and a low number of maxillary teeth,the specimens of Oligodon joynsoni(Smith,1917) from the Nonggang National Nature Reserve,Guangxi,China formerly identified as O. joynsoni ...On the basis of a different dorsal pattern,and a low number of maxillary teeth,the specimens of Oligodon joynsoni(Smith,1917) from the Nonggang National Nature Reserve,Guangxi,China formerly identified as O. joynsoni by several authors should be referred to the recently described species O. nagao David,Nguyen,Nguyen,Jiang,Chen,Teynié,and Ziegler,2012. Here,we provide the first genuine record of O. joynsoni(Smith,1917) in China based on a male specimen collected from Xishuangbanna,Yunnan,China.展开更多
Classification of the Asian snake genera Lycodon and Oligodon has proven challenging. We conducted a molecular phylogenetic analysis to estimate the phylogenetic relationships in the genus of Lycodon and clarify the t...Classification of the Asian snake genera Lycodon and Oligodon has proven challenging. We conducted a molecular phylogenetic analysis to estimate the phylogenetic relationships in the genus of Lycodon and clarify the taxonomic status of Oligodon multizonatum using mitochondrial（cyt b, ND4） and nuclear（c-mos） genes. Phylogenetic trees estimated using Maximum Likelihood and Bayesian Inference indicated that O. multizonatum is actually a species of Lycodon. Comparing morphological data from O. multizonatum and its closest relatives also supported this conclusion. Our results imply that a thorough review of the evolutionary relationships in the genus of Lycodon is strong suggested.展开更多
基金supported by grants from National Key R&D Program of China (Grant No. 2022YFC2602500)the Second Tibetan Plateau Scientific Expedition and Research Program (STEP) (2019QZKK0501)+4 种基金National Natural Science Foundation of China (32200363, 32325011, 32220103004, 32300370, 32400361)International Partnership Program of Chinese Academy of Sciences (071GJHZ2023041MI)China Postdoctoral Science Foundation (2023M743416)Sichuan Science and Technology Program (2023NSFSC1155, 2024NSFSC1180)Taxonomist Position, Chinese Academy of Sciences (CAS-TAX-24-051, CAS-TAX-24-052),Biological Resources Programme, Chinese Academy of Sciences (KFJ-BRP-017-086, KFJ-BRP-017-065)。
文摘A new species of the Kukri snake genus Oligodon is described from Medog County in the eastern Himalayas of China. The species, named Oligodon zhangfujii sp. nov., can be distinguished from all known congeners by a combination of the following morphological characteristics:(1) 17-17-15 dorsal scale rows;(2) six supralabials, third and fourth entering orbit;(3) one loreal present;(4)seven infralabials, first to fourth in contact with anterior chin shields;(5) 173 ventral scales and 47 pairs of subcaudal scales;(6) cloacal plate divided;(7) hemipenis single, shallowly bilobed, with large calcareous spines and a calyx area, sulcus spermaticus single;and(8) eight maxillary teeth.Phylogenetic analyses based on two mitochondrial genes revealed that this species occupies an independent phylogenetic position, distinct from the eight recognized species groups within the genus, and represents a sister taxon to the clade comprising the O. theobaldi and O. cinereus groups.The description is based on a single road-killed individual. As such, ecological data for the species remain sparse, underscoring the need for additional field surveys across the eastern Himalayan region.
基金supported by a Natural Sciences and Engineering Research Council (Canada) Discovery Grant A3148 to RWMsupported by NSERC, the Royal Ontario Museum (ROM) Foundationthe ROM Members Volunteer Committee
文摘The South and Southeast Asian snake genus Oligodon, known for its egg-eating feeding behavior, has been a taxonomically and systematically challenging group. This work provides the first phylogenetic hypothesis for the genus. We use approximately 1900 base pairs of mitochondrial DNA sequence data to infer the relationships of these snakes, and we examine congruence between the phylogeny and hemipenial characters. A hypothesis for the position of Oligodon within the Colubridae is also proposed. We discuss the implications of the phylogeny for previous taxonomic groupings, and consider the usefulness of the trees in analysis of behavior and biogeography of this genus.
基金supported by the grants from the Ministry of Science and Technology of China (MOST Grant No. 2011FY120200)the National Natural Science Foundation of China (31090100) the Chinese Academy of Sciences (KSCX2-YW-Z-0807, KSCX2- EW-Z-2), GEF (2011GXGEF006)
文摘On the basis of a different dorsal pattern,and a low number of maxillary teeth,the specimens of Oligodon joynsoni(Smith,1917) from the Nonggang National Nature Reserve,Guangxi,China formerly identified as O. joynsoni by several authors should be referred to the recently described species O. nagao David,Nguyen,Nguyen,Jiang,Chen,Teynié,and Ziegler,2012. Here,we provide the first genuine record of O. joynsoni(Smith,1917) in China based on a male specimen collected from Xishuangbanna,Yunnan,China.
基金supported by the National Natural Science Foundation of China (NSFC 31071913)
文摘Classification of the Asian snake genera Lycodon and Oligodon has proven challenging. We conducted a molecular phylogenetic analysis to estimate the phylogenetic relationships in the genus of Lycodon and clarify the taxonomic status of Oligodon multizonatum using mitochondrial（cyt b, ND4） and nuclear（c-mos） genes. Phylogenetic trees estimated using Maximum Likelihood and Bayesian Inference indicated that O. multizonatum is actually a species of Lycodon. Comparing morphological data from O. multizonatum and its closest relatives also supported this conclusion. Our results imply that a thorough review of the evolutionary relationships in the genus of Lycodon is strong suggested.
