Phylogenomic analyses reveals gene flow between populations of the freshwater shrimp Potimirim brasiliana (Caridea, Atyidae) along its wide distribution.

Potimirim is one of the 40 genera of Atyidae restricted to America, which occurs in coastal freshwater habitats and questions about population status and variability have been emerging. Potimirim brasiliana occurs in Brazil from the northeastern to southeastern region. In order to evaluate the hypothesis of genetic structure among populations, we performed molecular analyses with specimens from all known limit of distribution of the species.