The Experts below are selected from a list of 4386 Experts worldwide ranked by ideXlab platform
Song Huang - One of the best experts on this subject based on the ideXlab platform.
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The complete mitochondrial genome of the Xizang hot-spring snake, Thermophis baileyi Wall, 1907 (Reptilia, Colubridae)
Mitochondrial DNA Part B, 2016Co-Authors: Shi-yang Weng, Miao He, Li-fang Peng, Shuang-quan Duan, Song HuangAbstract:The Xizang hot-spring snake, Thermophis baileyi (Reptilia, Colubridae), is a relict species of the family Colubridae, which is known only from Tibet, China. In this study, we report the complete mi...
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complete mitochondrial genome of the xianggelila hot spring snake thermophis shangrila reptilia Colubridae
Mitochondrial DNA Part B, 2016Co-Authors: Li-fang Peng, Shi-yang Weng, Diancheng Yang, Changhu Lu, Song HuangAbstract:AbstractThe Xianggelila hot-spring snake, Thermophis shangrila (Reptilia, Colubridae), is a species of family Colubridae, which is seen only in Shangri-La, Northern Yunnan, China. Herein, the complete mitochondrial genome of this species has been reported. The total length of the genome was 17,327 bp, and composed of 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes and 2 control regions. The total base composition was 32.7% for A, 23.7% for T, 13.5% for G and 32.7% for C. The phylogenetic tree with 13 protein-coding genes of T. shangrila together with 12 other closely related species belonging to the family Colubridae was reconstructed.
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understanding the formation of ancient intertropical disjunct distributions using asian and neotropical hinged teeth snakes sibynophis and scaphiodontophis serpentes Colubridae
Molecular Phylogenetics and Evolution, 2013Co-Authors: Xin Chen, Song Huang, Guarino R Colli, Laurie J Vitt, Alexander R Pyron, Frank T BurbrinkAbstract:Abstract Numerous taxa show ancient intertropical disjunct distributions. Many can be explained by well-known processes of historical vicariance, such as the breakup of Gondwanaland. Others, such as Asian–Neotropical divergences are not as well understood. To clarify the phylogenetic position and understand biogeographic and temporal origins of the geographically disjunct and morphologically unique genera of hinged-teeth snakes, Scaphiodontophis (n = 1) and Sibynophis (n = 9; Colubridae), we inferred a time-calibrated phylogeny with additional 107 taxa representing the superfamily Colubroidea using four genes (c-mos, cyt-b, ND2, RAG-1; 3085 bp). We used this tree to estimate ancestral areas for the group. The results show that Scaphiodontophis is sister to Sibynophis, both originated in the late Eocene/Oligocene in Asia and likely dispersed through Beringia to the New World, but unlike other snake groups left no extant species in temperate North America. Current recognition of Scaphiodontophiinae renders Colubrinae paraphyletic, and we resurrect the previously named subfamily Sibynophiinae to encompass both genera and use the tribes Sibynophiini (Sibynophis) and Scaphiodontophiini (Scaphiodontophis) to highlight the geographically distinct areas occupied by these taxa. These results suggest that intercontinental dispersal with extinction in intermediate areas can explain puzzling patterns of ancient intertropical disjunct distributions.
Michael Wink - One of the best experts on this subject based on the ideXlab platform.
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evolution and phylogeny of the genus natrix serpentes Colubridae
Biological Journal of The Linnean Society, 2006Co-Authors: Daniela Guicking, Robin Lawson, Ulrich Joger, Michael WinkAbstract:Some aspects of the natural history of snakes of the colubrid genus Natrix have been well studied. With their extensive European distribution and relative abundance, their ecology, reproduction and behaviour are well known. Yet other facets of their biology remain poorly understood. These include knowledge of Natrix phylogeny, hypotheses explaining the current distribution of the three extant members of the genus, and their evolution and relationships. In this study we used molecular data, the nucleotide sequences of four protein-coding mitochondrial genes (3806 bp total), to provide a well-supported phylogeny for the genus Natrix. With these molecular data, evidence from the fossil record, and knowledge of palaeogeological events, we used two approaches in designing a time scale which we used to date the major events in Natrix speciation and intraspecific variation. Our data strongly support a phylogeny for the genus in which N. maura is basal with N. natrix and N. tessellata being sister species. The calibrated molecular clock suggests that N. maura diverged from the common ancestor of the three species 18–27 mya and that N. natrix and N. tessellata diverged 13–22 mya. Although the ranges of these estimates are large they support an early Miocene to late Oligocene origin for the three species. Intraspecific divergence is estimated to have commenced 5.3, 6.0 and 6.7 mya with evolutionary rates of 1 : 1.25 : 1.35% per million years for N. maura, N. natrix and N. tessellata, respectively. © 2006 The Linnean Society of London, Biological Journal of the Linnean Society, 2006, 87, 127–143.
Ana T C Ching - One of the best experts on this subject based on the ideXlab platform.
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some aspects of the venom proteome of the Colubridae snake philodryas olfersii revealed from a duvernoy s venom gland transcriptome
FEBS Letters, 2006Co-Authors: Ana T C Ching, Marisa Maria Teixeira Da Rocha, Adriana Franco Paes Leme, Daniel C Pimenta, Maria De Fatima D Furtado, Solange M T Serrano, Paulo Lee Ho, Inacio L M JunqueiradeazevedoAbstract:We investigated the putative toxins of Philodryas olfersii (Colubridae), a representative of a family of snakes neglected in venom studies despite their growing medical importance. Transcriptomic data of the venom gland complemented by proteomic analysis of the gland secretion revealed the presence of major toxin classes from the Viperidae family, including serine proteases, metalloproteases, C-type lectins, Crisps, and a C-type natriuretic peptide (CNP). Interestingly, the phylogenetic analysis of the CNP precursor showed it as a linker between two related precursors found in Viperidae and Elapidae snakes. We suggest that these precursors constitute a monophyletic group derived from the vertebrate CNPs.
Daniela Guicking - One of the best experts on this subject based on the ideXlab platform.
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evolution and phylogeny of the genus natrix serpentes Colubridae
Biological Journal of The Linnean Society, 2006Co-Authors: Daniela Guicking, Robin Lawson, Ulrich Joger, Michael WinkAbstract:Some aspects of the natural history of snakes of the colubrid genus Natrix have been well studied. With their extensive European distribution and relative abundance, their ecology, reproduction and behaviour are well known. Yet other facets of their biology remain poorly understood. These include knowledge of Natrix phylogeny, hypotheses explaining the current distribution of the three extant members of the genus, and their evolution and relationships. In this study we used molecular data, the nucleotide sequences of four protein-coding mitochondrial genes (3806 bp total), to provide a well-supported phylogeny for the genus Natrix. With these molecular data, evidence from the fossil record, and knowledge of palaeogeological events, we used two approaches in designing a time scale which we used to date the major events in Natrix speciation and intraspecific variation. Our data strongly support a phylogeny for the genus in which N. maura is basal with N. natrix and N. tessellata being sister species. The calibrated molecular clock suggests that N. maura diverged from the common ancestor of the three species 18–27 mya and that N. natrix and N. tessellata diverged 13–22 mya. Although the ranges of these estimates are large they support an early Miocene to late Oligocene origin for the three species. Intraspecific divergence is estimated to have commenced 5.3, 6.0 and 6.7 mya with evolutionary rates of 1 : 1.25 : 1.35% per million years for N. maura, N. natrix and N. tessellata, respectively. © 2006 The Linnean Society of London, Biological Journal of the Linnean Society, 2006, 87, 127–143.
Talita Gancev Ferreira - One of the best experts on this subject based on the ideXlab platform.
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A new species of hood-displaying Thamnodynastes (Serpentes: Colubridae) from the Atlantic forest in southeast Brazil
Zootaxa, 2003Co-Authors: Francisco L Franco, Talita Gancev Ferreira, Otavio A. V. Marques, Ivan SazimaAbstract:A new species of Thamnodynastes (Serpentes: Colubridae) from the Atlantic forest in southeast Brazil is described herein. The new species is diagnosed by the following set of characters: slender body; very long tail (about 50% of body length); 19 scale rows in the mid-body; high subcaudal scale count (101–109); and a series of 5–6 black blotches in the fore-body, shown during defensive displays. The new species is known from moderate elevations of the Serra do Mar range and its features indicate that it is one of the most arboreal species within the genus.
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descricao de uma nova especie de thamnodynastes wagler 1830 serpentes Colubridae do nordeste brasileiro com comentarios sobre o genero
Phyllomedusa: Journal of Herpetology, 2002Co-Authors: Francisco L Franco, Talita Gancev FerreiraAbstract:Description of a new species of Thamnodynastes Wagler, 1830 (Serpentes, Colubridae) from northeastern Brazil, with comments on the genus. Thamnodynastes almae sp. nov. is described based on three specimens from Rodelas Municipality, state of Bahia, Northeastern Brazil. The new species can be diagnosed by its pale coloration and keeled dorsal scales arranged in 19 rows at midbody and 15 rows posteriorly. Characters for distinguishing T. almae from other Brazilian species of Thamnodynastes are provided.
