Nymphs of Thraulodes Ulmer, 1920 (Insecta: Ephemeroptera: Leptophlebiidae) from Rio de Janeiro State, Brazil. An undescribed nymph of Thraulodes, herein called as Thraulodes sp., is described and illustrated based on a specimen from Itatiaia, Rio de Janeiro State, Brazil. Also is described and illustrated the nymph of T. itatiajanus Traver & Edmunds, 1967. In the nymphal stage both species are diagnosed mainly based on details of the mouthparts, gills, and colour pattern of the abdomen.
Atalophlebiinae; mayflies; aquatic insects; taxonomy; Neotropics