Department of Life Science, National Chung Hsing University, Taichung, Taiwan.
Mol Phylogenet Evol. 2011 Mar;58(3):427-38. doi: 10.1016/j.ympev.2010.11.013. Epub 2010 Nov 21.
The molecular phylogeny and biogeography of the East Asian freshwater crabs of the genus Nanhaipotamon (Decapoda: Brachyura: Potamidae) were studied, using two mitochondrial (16S rRNA and cytochrome oxidase I) and one nuclear (28S rRNA) markers, and correlated with various vicariant and dispersal events which have occurred in this region. The results showed Nanhaipotamon to be a monophyletic taxon with four clades which correspond to the topography of the coastal region of southeastern China and Taiwan Island. Mountains appear to play an important role in the distribution. The genus occurs only from east of the Wuyishan Range (Zhejiang and Fujian) and south of the Nanling Range (Guangdong) in southern China, and is also present west of the Central Range in Taiwan. The molecular and geological data suggest that Nanhaipotamon originated in an area between the Wuyishan and Nanling Ranges. In this area, the main and earliest cladogenesis occurred at ∼4.8 million years ago (mya), with speciation probably taking place at around 4mya. The molecular evidence strongly supports the recent invasion of the genus into Taiwan Island from northeastern Fujian, via the paleo-Minjiang River on the landbridge of Taiwan Strait. The presence of the genus in Dongyin Island, however, is through invasion from southeastern Zhejiang, during the Pleistocene glaciation period. Nanhaipotamon reached Taiwan and Dongyin Island at ∼1.0 and 0.4 mya, respectively. A small population of Nanhaipotamon formosanum from Penghu Islands (Pescadores) in the central Taiwan Strait has a slightly different genetic constitution and suggests it is a relict of past Pleistocene glaciations.
研究了东亚淡水蟹属南哈波东（十足目：短尾亚目：溪蟹科）的分子系统发育和生物地理学，使用了两个线粒体（16S rRNA 和细胞色素氧化酶 I）和一个核（28S rRNA）标记，并与该地区发生的各种隔离和扩散事件相关联。结果表明，南哈波东是一个单系类群，有四个分支，与中国东南沿海地区和台湾岛的地形相对应。山脉似乎在分布中起着重要作用。该属仅出现在中国南方武夷山山脉（浙江和福建）以东和南岭（广东）以南，以及台湾中央山脉以西。分子和地质数据表明，南哈波东起源于武夷山和南岭之间的一个地区。在这个地区，主要和最早的分支发生在约 480 万年前（mya），物种形成可能发生在大约 4mya 左右。分子证据强烈支持该属最近从东北福建通过台湾海峡古闽江陆桥入侵台湾岛。然而，东引岛的该属的存在是通过更新世冰期从浙江东南部入侵的。南哈波东分别于 1.0 和 0.4 mya 到达台湾和东引岛。澎湖群岛（澎湖群岛）的南哈波东福尔摩沙种群（Formosanum）的一小部分具有略微不同的遗传构成，表明它是过去更新世冰川作用的残余。
