Rapid divergent coevolution of Sinopotamon freshwater crab genitalia facilitates a burst of species diversification.

ABSTRACT: One of the most striking radiations in brachyuran evolution is the considerable morphological diversification of the external reproductive structures of primary freshwater crabs: the male first gonopod (G1) and the female vulva (FV). However, the lack of quantitative studies, especially the lack of data on female genitalia, has seriously limited our understanding of genital evolution in these lineages. Here we examined 69 species of the large Chinese potamid freshwater crab genus Sinopotamon Bott, 1967 (more than 80% of the described species). We used a landmark-based geometric morphometric approach to analyze variation in the shape of the G1 and FV, and to compare the relative degree of variability of the genitalia with non-reproductive structures (the third maxillipeds). We found rapid d

SUBMITTER: Yao F 

PROVIDER: S-EPMC7216907 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature