Apobaetis Day (Ephemeroptera: Baetidae) from northern Brazil: description of a new species and of the male imago of A. fiuzai Salles & Lugo-Ortiz

摘要

A new species of Apobaetis is described based on nymphs and male imago, and the male imago of A. fiuzai. Specimens were collected in the state of Amazonas, northern region of Brazil. Apobaetis hamadae sp. n. can be easily distinguished from the other congeners by the following combination of characteristics: male imago: (1) abdominal colour pattern; (2) area between forceps not excavated medially. Nymphs: (1) distal margin of labrum with shallow medial emargination and with four to five spatulated setae near midline; (2) maxillary palp 1.4x longer than galea-lacinia; (3) tarsal claws 1.2x times longer than tarsus. The male imago of A. fiuzai can be easily distinguished by the following characteristics: (1) abdominal colour pattern; (2) area between segments I of forceps with a deep V emargination.