ABSTRACT
ABSTRACT Five new species of Alisotrichia Flint, 1964 microcaddisflies are described and illustrated from type material collected in Northeastern Brazil, constituting the first records of the genus to this region, as it was previously known only from Southeastern and Northern Brazil. The number of Brazilian species of Alisotrichia is doubled herein from five to ten, however, likely there are still many other species to be described. The new species described here are all placed in the orophila species group: A. froehlichi sp. nov. (Sergipe State), A. calori sp. nov. (Bahia and Paraíba states), A. penispinata sp. nov. (Ceará and Pernambuco states), A. dilatata sp. nov. (Ceará and Mato Grosso do Sul states), and A. nordestina sp. nov. (Ceará and Sergipe states). These new species are separated mainly by features of male genitalia, particularly the dorsal area of segment X, the shape of the segment VIII, and the phallus morphology. Currently, the orophila species group is composed by 37 species, more than half of the species diversity of Alisotrichia.