Regional climates shape the biogeographic history of a broadly distributed freshwater crab species complex

Aim: The evolutionary importance of paleoclimate regimes has been noted in biogeographic studies. However, little is known about how paleoclimate differences shaped the biogeographic pattern and diversification history of the freshwater fauna in important zoogeographical boundary regions. Here, we aim to investigate how past regional climatic differences have shaped the biogeographic history of the inland aquatic fauna in China using an endemic freshwater crab species complex found on both sides of the Qinling Mountains–Huaihe River Line (QHL), a critical ecological boundary in eastern China, as a model system.

Location: Eastern China, the Qinling Mountains–Huaihe River Line.

Taxon: The Sinopotamon yangtsekiense species complex.

Methods: A total of 482 individuals of Sinopotamon yangtsekiense sensu lato were collected from 34 localities throughout its entire distributional range. The phylogeographic analyses of population structure, morphological and genetic variations, and dem...

目标：古气候体系的演化重要性已在生物地理研究中得到关注。然而，关于古气候差异如何塑造关键动物地理边界区域淡水动物的生物地理格局及分化历史，目前仍知之甚少。本研究以中国东部关键生态边界——秦岭-淮河线（QHL）两侧分布的特有淡水蟹物种复合体为模型系统，旨在探究过去区域气候差异如何塑造中国内陆水生动物的生物地理历史。

地点：中国东部，秦岭-淮河线。

分类单元：长江华溪蟹物种复合体（Sinopotamon yangtsekiense species complex）。

方法：从该类群整个分布区的34个采样点共采集482个广义长江华溪蟹（Sinopotamon yangtsekiense sensu lato）个体。对种群结构、形态与遗传变异及dem...