Taxonomic reappraisal of Hynobius tokyoensis, with description of a new species from northeastern Honshu, Japan (Amphibia: Caudata)
Taxonomic reappraisal of Hynobius tokyoensis, with description of a new species from northeastern Honshu, Japan (Amphibia: Caudata)
复制标题
东京小鲵的分类学重新评估，以及来自日本本州东北部的一个新物种的描述（两栖类：有尾目）
DOI：
10.11646/zootaxa.5168.2.7
复制
发表时间：
2022
期刊：
影响因子：
0.9
通讯作者：
NISHIKAWA KANTO
中科院分区：
文献类型：
--
作者：
MATSUI MASAFUMI;MISAWA YASUCHIKA;YOSHIKAWA NATSUHIKO;NISHIKAWA KANTO
以往基于线粒体DNA的系统发育研究一致认为，东京小鲵由两个主要分支组成，即分支A（北方分支）和分支B（南方分支）。在这项研究中，我们重新估计了他们的群体遗传结构和系统发育关系的核SNPs，结果表明，异质性的关系，这两个线粒体分支之间没有杂交。它们也被认为是形态上不同的。H. tokyoensis位于东京县，因此分支B对应于H。tokyoensis sensu stricto，使进化枝A没有可用的科学名称。因此，我们将从关东东北部到东北南部的分支A描述为一个新种。新种与H. tokyoensis的腋腹股沟距离相对较长，躯干较短，犁骨齿系列较深，估计在上新世晚期与它分歧。
Previous phylogenetic studies based on mitochondrial DNA data have consistently suggested that Hynobius tokyoensis consists of two major clades, clade A (northern clade) and clade B (southern clade). In this study, we newly estimated their population genetic structure and phylogenetic relationships by nuclear SNPs, and the results suggested heterospecific relationships of the two mitochondrial clades, without present hybridization in between. They were also recognized as morphologically different. The type locality of H. tokyoensis is in Tokyo Prefecture, and therefore clade B corresponds to H. tokyoensis sensu stricto, leaving clade A without available scientific name. We, thus, describe the clade A from northeastern Kanto to southern Tohoku as a new species Hynobius sengokui. The new species is distinguished from H. tokyoensis by its relatively longer axilla-groin distance, shorter trunk, and deeper vomerine teeth series, and is estimated to have diverged from it during the late Pliocene.