Description of a new species of Byrsopteryx (Trichoptera: Hydroptilidae) from Rio de Janeiro State, Brazil, including its immature stages

摘要

Byrsopteryx Flint, 1981 is a small genus of microcaddisflies exclusively Neotropical in distribution. Currently, 15 species are known in the genus, 2 of which occur in Brazil, both described from Rio de Janeiro State. In this paper, we provide descriptions and illustrations for all stages of a new species of Byrsopteryx from Rio de Janeiro State, Brazil. Byrsopteryx carioca sp. nov. is distinguished from other Byrsopteryx species by male genitalia with a pair of spine-like ventral projections posteriorly on segment IX, the dorsolateral processes from segment IX each with an acute ventral projection, and the phallus simple internally with a short, bifurcate apical sclerite. In addition, we describe the female of Byrsopteryx espinhosa Harris & Holzenthal, 1994, and record Byrsopteryx abrelata Harris & Holzenthal, 1994, from Sao Paulo State, Brazil.