A study on formation process of the biogeographic boundary between the Indochinese and Sundaic invertebrate faunas

Kra地峡和Kangar-Pattani线位于马来半岛，被认为代表了Sundaic和印度支那生物群之间的动物地理边界。基于分子、形态和生态学资料，研究了几种无脊椎动物（昆虫和蜗牛）的历史生物地理学，以确定巽他兰和印度支那之间物种形成事件的时间和起源。结果表明，在巽他兰和印度支那之间形成姐妹类群关系的无脊椎动物，可能是由于中新世晚期和上新世早期的海侵，在5.0 ~ 6.0 Mya和（或）9.5 ~ 10.0 Mya的克拉地峡或马来半岛坎加尔-北大年线，从每一类群的共同祖先中分离出来的。在此基础上，对部分类群进行了分类修正。

The Isthmus of Kra and the Kangar-Pattani line, which are located on the Malay Peninsula, are considered to represent the zoogeographic boundary between the Sundaic and Indochinese biotas. Based on the molecular, morphological and ecological data, we investigated the historical biogeography of several invertebrates (insects and land snails) to determine the timing and origin of speciation events between Sundaland and Indochina.Our results show that the invertebrates forming a sister group relationship between Sundaland and Indochina may have diverged vicariantly from the common ancestor of each group at 5.0-6.0 Mya and/or 9.5-10.0 Mya in the Isthmus of Kra or the Kangar-Pattani line of the Malay Peninsula, probably due to the late Miocene and the early Pliocene marine transgressions. Additionally, some groups were taxonomically revised based on the analyses.