Cheumatopsyche meo Oláh & Johanson, 2008

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 : 32-34

Cheumatopsyche meo Oláh & Johanson , new species

Fig. 83–86

This species is similar to C. trifasciata described from the Fujian Province in China, and is separated by the unicolorous, pale brown forewings and lacking the 3 white fasciae; the apicoventral setal lobes of segment X are obtusely angled mesad, and are not rectangular; the lateral setose warts of segment X are located distally on the segment, not centrally; and segment X is much longer.

Male. Body and wings pale light brown with brown pubescence. Maxillary palp segment I shortest, segment II longer, segments III and IV equally long, segment V as long as sum of segments I–IV. Head dorsum light brown with 9 lighter coloured warts. Proepisternum without swollen setal wart. Protarsal claws symmetrical, without setal bundle. Forewing length 5.8 mm, hind wing length 4.2 mm. Hind wing fork I absent.

Male genitalia. Abdominal segment IX fused annularly; sternum slightly longer than tergum ( Fig. 83); anterior margins of segment IX convex,, anterior margin nearly straight at mid-height; ventrally strongly incised posterad ( Fig. 83); apical lobe on posterolateral margins blunt, obtuse apices present slightly above base of coxopodites; spine row on posterior margins of segment IX complete ( Fig. 83). Intersegmental step between segment IX and segment X deep, right-angled. Segment X long, nearly quadrangular in lateral view ( Fig. 83), trilobed in dorsal view ( Fig. 84). Apex of setaless mesocaudal lobe acutely triangular in dorsal view ( Fig. 84); tapering and pointing dorsad in lateral view ( Fig. 83). Apicoventral setal lobes strongly produced posterad, curving dorsad, tapering in lateral view. Longitudinal sutures on segment X forming forming continuation of apicoventral setal lobes ( Fig. 83) near ventral margin of segment X, reaching posterior margin of segment IX. Lateral interlobular gap on segment X narrow and deep in lateral view ( Fig. 83); dorsal interlobular gap small, encircled by apicoventral setal lobes in dorsal view ( Fig. 84). Pair of lateral setose areas forming small elevated warts distally on segment X, clearly visible in dorsal and lateral view ( Fig. 83, 84); apices not exceeding lateral margins of segment X in dorsal view ( Fig. 84), apices almost tangental with bottom of lateral interlobular gaps ( Fig. 83). Transverse suture hardly discernible, associated with dorsal hump immediately after mid-length of segment X, clearly visible in lateral view ( Fig. 83), dividing segment X into slightly sclerotised basal part and more strongly sclerotised distal part. Coxopodites straight, exceeding apex of segment X ( Fig. 83). Harpagones evenly tapering in lateral and ventral view ( Fig. 83, 85); slightly curving dorsad ( Fig. 83); straight in ventral view ( Fig. 85). Phallothecal dorsum slightly convex along its length ( Fig. 86); sclerotised endothecal process short, ovoid; phallotremal sclerites broad, orienting vertical in lateral view; vestigial, membranous endothecal lobes visible on less sclerotised apicoventral corner, phallothecal ventrum convex, with slightly sclerotised corners.

Holotype male: VIETNAM: Son La Province: Moc Chau , 25.x.1986, light [J. Oláh] ( OPC, in alcohol).

Distribution: Vietnam.

Etymology: after the ethnic minority “meo” living near the type locality.