Three new species of microcaddisflies (Trichoptera: Hydroptilidae) from Brazil

Allan Paulo Moreira Santos,Jorge Luiz Nessimian,Gabriela Abrantes Jardim

doi:10.1590/s1984-46702011000600015

Abstract

Three new species of Hydroptilidae are herein described and illustrated from specimens collected with light traps in the states of Pará and Rio de Janeiro, Brazil. Flintiella carajas sp. nov., from Floresta Nacional de Carajás, shares with F. panamensis Harris, Flint & Holzenthal, 2002, F. tamaulipasa Harris, Flint & Holzenthal, 2002, F. yanamona Harris, Flint & Holzenthal, 2002, and F. manauara Santos & Nessimian, 2009 a deeply incised phallic apex. However, males can be distinguished by a ventromesal process on segment VII, by lacking dorsal hooked processes on segment IX, by the elongate subgenital plate, and by the lateral lobes of the phallic apex slightly curved laterad. Rhyacopsyche diacantha sp. nov. is closely related to R. yatay Angrisano, 1989 and R. garuhape Angrisano & Sganga, 2009. All three species have complex inferior appendages with ventral and dorsal lobes. The new species is distinguished by the male genitalia with segment X two times longer than broad, inferior appendages with the apices obliquely truncate, and a bilobed dorsal lobe on the inferior appendages. Features of the male genitalia of Rhyacopsyche angra sp. nov., R. hagenii and R. dikrosa are similar, but the first species can be distinguished by the inferior appendages truncate apically and produced laterad, and a phallus with the internal tubule hooked subapically and apically.

Highlights

Hydroptilidae is the most diverse family in the order Trichoptera, with about 2,000 described species found on every habitable continent (HOLZENTHAL et al 2007). MARSHALL (1979) reviewed the family and proposed the classification currently accepted, with two subfamilies, Hydroptilinae and Ptilocolepinae
The new species is distinguished by the male genitalia with segment X two times longer than broad, inferior appendages with the apices obliquely truncate, and a bilobed dorsal lobe on the inferior appendages
Features of the male genitalia of Rhyacopsyche angra sp. nov., R. hagenii and R. dikrosa are similar, but the first species can be distinguished by the inferior appendages truncate apically and produced laterad, and a phallus with the internal tubule hooked subapically and apically

Summary

Introduction

Hydroptilidae is the most diverse family in the order Trichoptera, with about 2,000 described species found on every habitable continent (HOLZENTHAL et al 2007). MARSHALL (1979) reviewed the family and proposed the classification currently accepted, with two subfamilies, Hydroptilinae and Ptilocolepinae. Males of the new species are recognized by having segment VII with a ventromesal process; segment IX reduced ventrally and mesally notched on its posterodorsal margin; segment X round in dorsal view and bilobed in lateral view; inferior appendages with apical margins round; subgenital plate divided into two apically convergent arms; phallus deeply divided apically, with an ejaculatory duct protruding between the lateral lobes, which are truncate and slightly curved laterad in dorsal view and upturned in lateral view.

Results

Conclusion