Abstract
Atopsyche is the largest genus of hydrobiosids, comprising 139 species in three subgenera (Atopsyche, Atopsaura, and Dolochorema), distributed from southwestern United States to northeastern Uruguay. Atopsyche (Atopsaura) is the most diverse subgenus with 65 species, Atopsyche (Atopsyche) with 51, and Atopsyche (Dolochorema) with three. This paper provides a taxonomic study of Atopsyche, including descriptions of A. (Atopsyche) bravoi n. sp. from Ecuador, A. (Atopsaura) beckeri n. sp. from Cuba, A. (Atopsaura) japi n. sp. from Brazil, and the redescription of A. (Atopsaura) usingeri. Additionally, the morphological variations of A. (Atopsaura) antisuya and A. (Atopsaura) diamantina are presented, as well new records. These results contribute to taxonomical knowledge of Atopsyche and increase the number of described species to 142.
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