Mountains, Lakes, and Ancient Drainage Networks Sculpt the Phylogeographic Architecture of the Stream Headwater Fish <i>Acrossocheilus kreyenbergii</i> in China.

ABSTRACT:

Background

Phylogeographic surveys of obligate freshwater fishes could serve as a pivotal lens through which the biological footprints of historic drainage rearrangements can be deciphered.

Methods

Focusing on the headwater-restricted cyprinid Acrossocheilus kreyenbergii in the Pearl, Yangtze, and Huai river basins, we examined variations in mitochondrial cytochrome b gene (Cyt b) to elucidate the phylogeographic architecture and evolutionary history of this stream fish in South-Central China through integrative analyses of phylogeny, ancestral area reconstruction, genetic structure, and population demography.

Results

A time-calibrated phylogeny recovered two primary lineages, K-I and K-II, which diverged ca. 2.15 Ma: K-I split into K-Ia (Huai Riv

SUBMITTER: Chen Y 

PROVIDER: S-EPMC12732399 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature