Leptophlebiidae Banks, 1900 (Insecta, Ephemeroptera) from Maranhão state, Brazil

A checklist and new records of Leptophlebiidae (Ephemeroptera) are presented for the Maranhão state, in Brazil's Northeast Region. Fifteen 15 genera and 20 species of Leptophlebiidae were identified. Farrodes xingu, Hermanellopsis arsia, Hydromastodon sallesi, Miroculis duckensis, Thraulodes marreroi , and Tikuna bilineata are reported for the first time for the Northeast Region, and Miroculitus emersoni is recorded for the first time in Brazil. The number of known species of Leptophlebiidae in Maranhão is increased from three to 21.