Phylogenetics and integrative taxonomy of African water snakes (Squamata: Colubridae: Grayia)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F24%3A10136407" target="_blank" >RIV/00023272:_____/24:10136407 - isvavai.cz</a>

Result on the web

<a href="https://bioone.org/journals/herpetological-monographs/volume-38/issue-1/HERPMONOGRAPHS-D-23-00002.1/Phylogenetics-and-Integrative-Taxonomy-of-African-Water-Snakes-Squamata/10.1655/HERPMONOGRAPHS-D-23-00002.1.short" target="_blank" >https://bioone.org/journals/herpetological-monographs/volume-38/issue-1/HERPMONOGRAPHS-D-23-00002.1/Phylogenetics-and-Integrative-Taxonomy-of-African-Water-Snakes-Squamata/10.1655/HERPMONOGRAPHS-D-23-00002.1.short</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1655/HERPMONOGRAPHS-D-23-00002.1" target="_blank" >10.1655/HERPMONOGRAPHS-D-23-00002.1</a>

Result language

angličtina

Original language name

Phylogenetics and integrative taxonomy of African water snakes (Squamata: Colubridae: Grayia)

Original language description

Grayia Günther 1858 is a genus of relatively large (1.2-2.5 m) aquatic Afrotropical snakes. Recent molecular phylogenies recovered Grayia in its own distinct subfamily (Grayiinae), which was supported as the sister group to Colubrinae. Tropical African snakes are generally understudied, so the relationships within Grayia are poorly known. High degrees of intra- and interspecies variation can make identification difficult, and previous studies involving Grayia included misidentified specimens in other genera. The goal of this study is to create a phylogenetic tree that can be used to understand the relationships and taxonomy of Grayia via an integrative taxonomic approach that combines molecular data for 60 specimens and morphological data for 719 specimens. Two nuclear (BDNF, NT3) and four mitochondrial genes (COI, cyt b, 16S, and ND4) were used to construct phylogenetic trees with Maximum Likelihood and Bayesian Inference algorithms. The phylogenetic trees recovered two clades, Grayia caesar + G. tholloni and G. ornata + G. smythii, which the time-calibrated Bayesian Evolutionary Analysis Sampling Tree (BEAST) analysis estimated to have diverged from each other in the mid-Oligocene. This deep divergence, combined with distinct morphological differences, led us to resurrect the name Xenurophis Günther 1863 as a subgenus [G. (Xenurophis) caesar, G. (Xenurophis) tholloni]. Molecular and morphological evidence further supports a new cryptic species of Grayia from the Upper and Middle Congo River and its tributaries. This new species is estimated to have diverged from its nearest sister species, G. ornata, in the Late Miocene-which coincides with the divergence dates of sister taxa within other Central African snake genera. Grayia ornata sensu stricto was found to consist of several evolutionary lineages, which mirror the patterns recovered in other Central African vertebrates.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10613 - Zoology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Herpetological Monographs

ISSN

0733-1347

e-ISSN

—

Volume of the periodical

38

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

52

Pages from-to

1-52

UT code for WoS article

999

EID of the result in the Scopus database

999