Redescription of Atyaephyra desmarestii (Millet, 1831) (Decapoda, Caridea, Atyidae) based on topotypical specimens

The freshwater shrimp, Atyaephyra desmarestii (Millet, 1831) is redescribed on the basis of a topotypical population (Toulouse). Its original description by Millet (1831) is very short and inadequate. Concerning populations from the same area, no further descriptive information has been actually given. Specimens studied from a Belgian population (Ombret) did not show any important differences from the French ones.