Baetidae (Insecta: Ephemeroptera) from northeastern Brazil

New records and notes on the distribution of the family Baetidae are presented. The following genera are reported for this region: Americabaetis, Apobaetis, Aturbina, Baetodes, Callibaetis, Camelobaetidius, Cloeodes, Cryptonympha, Guajirolus, Paracloeodes, Rivudiva, Spiritiops, Waltzoyphius and Zelusia. With the results of the present study, the Northeast Region of Brazil ceases to be one of Brazil's five geographic regions with the least-known Baetidae fauna to become the region with the second highest number of known species in the family, increasing the number from 15 to 36 species