Three new species of Atopsyche Banks (Hydrobiosidae) from Brazil are described and illustrated: Atopscyhe (Atopsaura) blahnikisp. n., Atopsyche (Atopsyche) paraunasp. n., and Atopsyche (Atopsaura) galharadasp. n. Additional illustrations of the male genitalia of Atopsyche urumarca Schmid are provided, including its populational variation. Also, we provide new state records for 2 species: Atopsyche (Atopsyche) urumarca from São Paulo, and Atopsyche (Atopsaura) plancki Marlier from Santa Catarina.
Keywords: Atlantic forest; Atopsyche; Brazil; Hydrobiosidae; Neotropics; caddisfly.