The Genus Rhyacophila Pictet (Trichoptera: Rhyacophilidae) in Vietnam

Currently, 20 species of the genus Rhyacophila are known from Vietnam. Of these, 17 species are distributed among eight species groups, with three species unassigned. Examination of material collected by personnel of the Royal Ontario Museum in Toronto, Canada has revealed six new species and five new records of Rhyacophila from Vietnam, distributed among six species groups, four of which are new to Vietnam. Newly described species include: Rhyacophila smithi, Rh. curriei, Rh. laocai, Rh. meyi, Rh. olahi, and Rh. fernandi. Rhyacophila bidens Kimmins, Rh. inaequalis Denning and Schmid, Rh. lhabu Schmid, Rh. malayana Banks, and Rh. rhombica Martynov are recorded from Vietnam for the first time. The females of four species, Rh. bidens, Rh. immaculata Mey, Rh. malayana Banks, and Rh. tamdaona Oláh, are described for the first time. All 31 species of Rhyacophila now known from Vietnam are included in this work, organized by branch and species group.