Tang Da, Xu Tianjun, Sun Yuena
Laboratory of Fish Biogenetics and Immune Evolution, College of Marine Science, Zhejiang Ocean University, Zhoushan 316022, China.
Laboratory of Fish Biogenetics and Immune Evolution, College of Marine Science, Zhejiang Ocean University, Zhoushan 316022, China.
Mar Genomics. 2015 Aug;22:37-44. doi: 10.1016/j.margen.2015.03.006. Epub 2015 Mar 24.
Hynobius chinensis was first described by Günther in the nineteenth century. At present, the origins of the extinct Hynobius chinensis on the Zhoushan Island (Hynobius chinensis-ZI) remain a mystery. It is the only species of family Hynobiidae on the Zhoushan Island. However, there is very little empirical evidence regarding Hynobius chinensis-ZI phylogenetic relationship, and when or how did its ancestors colonized the island. Here, we used mitochondrial genome data to recover the phylogeny of family Hynobiidae. Results suggested that the origin of Hynobiidae was most likely in Middle Cretaceous (~112.9 Mya), and some Hynobius species of Taiwan and Japan diverged earlier than that of the mainland of China. Hynobius chinensis-ZI diverged from its closest living relative (Hynobius yiwuensis) around 6.5 Mya, and Hynobius chinensis-ZI was isolated on Zhoushan Island since the postglacial transgression in Holocene period.
中国小鲵最早由冈瑟在19世纪描述。目前，舟山岛上已灭绝的中国小鲵（舟山中国小鲵）的起源仍是个谜。它是舟山岛上小鲵科的唯一物种。然而，关于舟山中国小鲵系统发育关系以及其祖先何时、如何在该岛定殖的实证证据非常少。在此，我们利用线粒体基因组数据来重建小鲵科的系统发育。结果表明，小鲵科的起源最有可能在白垩纪中期（约1.129亿年前），台湾和日本的一些小鲵物种比中国大陆的小鲵物种分化得更早。舟山中国小鲵与其现存最近亲缘种（义乌小鲵）大约在650万年前分化，并且自全新世冰后期海侵以来，舟山中国小鲵一直孤立于舟山岛。
