Atypical habitats of seasonal killifish in the Mid-Northeastern Caatinga ecoregion, northeastern Brazil. (A) Main channel of the Cruxati river basin (locality 2) and (B) partially shaded temporary pond (locality 3) of Hypsolebias martinsi in the Mundaú river basin floodplains, Itapipoca municipality in Ceará State. (C) Details of H. antenori temporary pond in the rocky outcrops (D) of Lajedo Soledade (locality 21) in the Jandaíra karstic formation in the Apodi-Mossoró river basin, Apodi municipality in Rio Grande do Norte State.