Mesozoic origin and 'out-of-India' radiation of ricefishes (Adrianichthyidae)
Mesozoic origin and 'out-of-India' radiation of ricefishes (Adrianichthyidae)
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DOI：
10.1098/rsbl.2021.0212
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发表时间：
2021-08-04
期刊：
影响因子：
3.3
通讯作者：
Kitano, Jun
中科院分区：
文献类型：
--
作者：
Yamahira, Kazunori;Ansai, Satoshi;Kitano, Jun
印度次大陆在地质上与欧亚大陆不同，但其上的许多陆生动植物物种在亚洲其他地区，特别是在东南亚，都有同源或姊妹种。印度和东南亚之间的动物区系和植物区系的相似性可以用两种地理情景来解释，“进入印度”或“离开印度”。基于完整的线粒体基因组和五个核基因对稻鱼（阿德里安鱼科）进行了系统发育分析，以研究这两种生物地理情景中哪一种更适合。我们发现，Oryzias setnai，唯一的adrianichthyid分布和特有的西高止山脉，山脉平行于印度次大陆的西海岸，是姐妹所有其他adrianichthyids从印度东部和东南亚。分歧的时间估计和祖先的地区重建表明，这印度西部的物种分歧在中生代后期向北漂移的印度次大陆。这些研究结果表明，adrianichthyids分散向东的印度次大陆与欧亚大陆碰撞后，“出”，随后在东南亚多样化。对“印度以外”类群的地理分布的回顾表明，它们可能在很大程度上促进或改变了欧亚大陆的生物多样性。
The Indian subcontinent has an origin geologically different from Eurasia, but many terrestrial animal and plant species on it have congeneric or sister species in other parts of Asia, especially in the Southeast. This faunal and floral similarity between India and Southeast Asia is explained by either of the two biogeographic scenarios, 'into-India' or 'out-of-India'. Phylogenies based on complete mitochondrial genomes and five nuclear genes were undertaken for ricefishes (Adrianichthyidae) to examine which of these two biogeographic scenarios fits better. We found that Oryzias setnai, the only adrianichthyid distributed in and endemic to the Western Ghats, a mountain range running parallel to the western coast of the Indian subcontinent, is sister to all other adrianichthyids from eastern India and Southeast-East Asia. Divergence time estimates and ancestral area reconstructions reveal that this western Indian species diverged in the late Mesozoic during the northward drift of the Indian subcontinent. These findings indicate that adrianichthyids dispersed eastward 'out-of-India' after the collision of the Indian subcontinent with Eurasia, and subsequently diversified in Southeast-East Asia. A review of geographic distributions of 'out-of-India' taxa reveals that they may have largely fuelled or modified the biodiversity of Eurasia.