Cheumatopsyche expeditionis (Ulmer, 1938)

Oláh, János, Johanson, Kjell Arne & Barnard, Peter C., 2008, Revision of the Oriental and Afrotropical species of Cheumatopsyche Wallengren (Hydropsychidae, Trichoptera), Zootaxa 1738, pp. 1-171 : 41

4. Cheumatopsyche expeditionis species group

The species in this group have a shortened trilobed segment X ( Fig. 4) with a deeply stepped intersegmental depression between segment IX and segment X. The apicoventral setal lobes are orienting posterad, not curving dorsad. The shortening of the setaless mesocaudal lobe is sometimes so advanced that the lobe disappears, producing an almost bilobed segment X in dorsal view. The setaless mesocaudal lobe never forms a concave apical margin in dorsal view as in the C. costalis species group. This species group is distributed in the southeastern archipelagos of the Oriental Region, mostly in the Philippines, Indonesia, with a single species, C. modica McLachlan from New Guinea and expanding into Australasia. A single species ( C. bohakayi ) also occurs at high elevations in Madagascar.