Phylogenetic analyses of Gammaridae crustacean reveal different diversification patterns among sister lineages in the Tethyan region
Phylogenetic analyses of Gammaridae crustacean reveal different diversification patterns among sister lineages in the Tethyan region
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伽玛里达甲壳类动物的系统发育分析揭示了特提斯地区姐妹谱系之间的不同多样化模式
DOI：
10.1111/cla.12055
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发表时间：
2014-08-01
期刊：
影响因子：
3.6
通讯作者：
Li, Shuqiang
中科院分区：
文献类型：
--
作者：
Hou, Zhonge;Sket, Boris;Li, Shuqiang
钩虾科在端足类中的物种多样性和分布格局差异最大，有些属的分布范围从古北界到新北界，而另一些属则仅限于地中海地区或古特提斯边缘。在这里，我们提出了第一个分子系统发育分析钩虾科调查其进化历史，使用四个遗传标记和一套全面的类群代表198种。系统发育分析结果表明，钩虾科起源于白垩纪的特提斯地区，在古新世末期分裂为三个形态和地理上截然不同的谱系。多样性分析结合古地质证据表明，海平面升降和构造抬升导致的特提斯变迁引发了三个谱系不同的多样性模式和范围扩展。钩虾属经历了早期快速辐射到欧亚大陆和北美，然后走向现代物种的衰落。Pontogammarids保持稳定的多样化与特提斯盆地周围的限制性分布，而sarothrogammarids经历了古特提斯边缘搁浅的进化停滞。我们的研究结果表明，环境变化在钩虾科谱系的多样化中发挥了重要作用，这可能是一个机会，以促进适应性辐射在新的栖息地，或限制导致进化孑遗。(C)2013年的Willi Hennig Society。
The Gammaridae shows the greatest disparity in species diversity and distribution pattern in the Amphipoda, with some genera ranging from the Palearctic to Nearctic, while others are limited to the Mediterranean region or ancient Tethyan margins. Here we present the first molecular phylogenetic analysis of the Gammaridae to investigate its evolutionary history using four genetic markers and a comprehensive set of taxa representing 198 species. The phylogenetic results revealed that the Gammaridae originated from the Tethyan region in the Cretaceous, and split into three morphologically and geographically distinct lineages by the end of the Paleocene. Diversification analysis combined with paleogeological evidence suggested that the Tethyan changes induced by sea-level fluctuation and tectonic uplift triggered different diversification modes and range expansions for the three lineages. The Gammarus lineage underwent an early rapid radiation across Eurasia and North America, then declined towards modern species. Pontogammarids maintained stable diversification with restricted distributions around the Tethyan basin, whereas sarothrogammarids experienced evolutionary stasis by stranding on the ancient Tethyan margins. Our findings suggest that environmental changes have played an important role in the diversification of Gammaridae lineages, which could be an opportunity to promote adaptive radiations in new habitats, or constraints resulting in evolutionary relicts. (C) The Willi Hennig Society 2013.