Preliminary survey of genera and species of Baetidae (Insecta: Ephemeroptera) from São Paulo State, with emphasis in the fauna sampled in low order forested stream. Although in Brazil, there has been an increasing number of studies on Baetidae in the last years, until the present study only three nominal species have been reported from the São Paulo State. Herein, we report the following taxa sampled in 15 low order forested streams from different macro-regions of São Paulo State: Americabaetis alphus, A. labiosus, A. longetron, Apobaetis fiuzai, Aturbina georgei, Baetodes cf. serratus, Callibaetis sp. 1, Callibaetis sp. 2, Camelobaetidius anubis, Cloeodes irvingi, Cryptonympha sp., Paracloeodes eurybranchus, Waltzoyphius fasciatus, and Zelusia principalis.
Baetidae; Ephemeroptera; Brazil; São Paulo State; new reports