A new species of Aegla Leach, 1820 (Crustacea, Anomura) from the Iguaçu River basin, Brazil.

A new species of aeglid crab, Aegla okora n. sp., is described.

Checklist of species of Stratiodrilus Haswell, 1900 (Annelida: Histriobdellidae), and new host records from Southern Brazil.

Species of Stratiodrilus are ectocommensals of freshwater decapod crustaceans, and the genus is also the most speciose within the family Histriobdellidae. However, a global review of the species of Stratiodrilus and their hosts has not been performed in nearly two decades. Based new field collections in Brazil and a literature search, we present a list of Stratiodrilus species and their hosts.