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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 28, No. 4, 2007, pp. 430-436
Bioline Code: zr07065
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 28, No. 4, 2007, pp. 430-436

 en The Validity of Red Knobby Newt ( Tylototriton shanjing check for this species in other resources ) Species Status Based on Mitochondrial Cyt b Gene
ZHANG, Ming-wang; RAO, Ding-qi; YU, Guo-hua & YANG, Jun-xing


The delimitation between Tylototriton shanjing and T. verrucosus was not clear. Forty individuals of T. verrucosus and T. shanjing were collected from fourteen localities in Southwest China and 753 bp of partial mitochondrial Cyt b gene sequence were sequenced. Molecular phylogenetic trees of T. verrucosus group were reconstructed using neighbor-joining, maximum parsimony and Bayesian inference methods. Pairwise sequence comparisons to determine the amount of variation were performed using MEGA 3.0 software. According to the results of phylogeny analysis and Kimura 2-parameter distance, the species validities were evaluated. The results showed that: (1) the T. shanjing did not form a monophyletic group; (2) the genetic distance was low between T. shanjing and T. verrucosus, it was only 1.2% on average. Therefore, T. shanjing as a valid species is not supported and can be argued to be a synonym of T. verrucosus. According to our phylogenetic tree, the genetic divergences and geographic distribution, T. verrucosus' distribution in the Yunnan Province can be divided into three geographic groups, i.e. the Pianma group, the Middle and West Yunnan group and the Southeast Yunnan group.

Red knobby newt (Tylototriton shanjing), Validity, Mitochondrial DNA, Cyt b gene, Taxonomic status

© Copyright 2007 Kunming Institute of Zoology, the Chinese Academy of Sciences
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