New species and new record of Thraulodes Ulmer, 1920 (Ephemeroptera: Leptophlebiidae: Atalophlebiinae) from Brazil.

A new species of the mayfly genus Thraulodes is described based on specimens from the state of Roraima, Brazil. The male imago of Thraulodes rodrigoi sp. nov. is described and the new species can be easily recognized by: forewing with one weakly marked cross veins basal to bullae; femora of forelegs with an apical transversal band brown heavily marked and one submedian macula; styliger plate triangular with a medial rounded projection; and penes short and wide, without lateral pouch. Thraulodes sternimaculatus Lima, Mariano Pinheiro, 2013 is also reported for the first time in Piauí State.