The genus Anacroneuria Klapálek, 1909 (Plecoptera: Perlidae) from Maranhão State, northeastern Brazil.

Based on collections made from streams of the Itapecuru, Parnaíba and Tocantins River basins, three species of Anacroneuria Klapálek are recorded for the first time from Maranhão State, northeastern Brazil: A. atrifrons Klapálek, A. minuta Klapálek and A. singularis Righi-Cavallaro Lecci. Additionally, A. leccii sp. nov. is described from this material and remarks concerning A. marlieri are also presented.