Cheumatopsyche suswanad Oláh & Barnard, 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 : 143-145

Cheumatopsyche suswanad Oláh & Barnard , new species

Fig. 344–348

The species is similar to C. songda from Vietnam, from which it is easily separated by the uniformly coloured forewing membranes. Segment X is almost quadrangular as in C. songda but is separated by the presence of transverse sutures that are not obliquely crossing segment X, and by the apex of the setaless mesocaudal lobe being less produced dorsad. The harpagones are more uniformly tapering in lateral view, and there is a pronounced long hiatus in the posterior spine row on segment IX. Furthermore, the ventrocaudal spiny lobe of segment IX is much broader than in C. songda .

Male. Body and wings brown with brown pubescence; forewings without spots. 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 brown with 7 light coloured warts. Proepisternum without swollen setal wart. Protarsal claws asymmetrical, laterally flanked by setal bundle. Forewing length 7.5 mm, hind wing length 5.8 mm. Hind wing fork I absent.

Male genitalia. Segment IX fused annularly; tergum very short, almost completely reduced ( Fig. 344); sternum well developed, continuing into long, ventrocaudal spiny lobe with 10–12 stout stiff spines ( Fig. 345); anterior margins of segment IX convex, more acute ventrally; apical lobe on posterolateral margins widely triangular, located at mid-height of segment IX, dorsally bordering wide articulation cavity of coxopodites ( Fig. 344); spine row on posterior margins of segment IX incomplete, with long hiatus at near midheight of segment X; dorsal spines 2–3 times longer and stiffer than spines on apical lobe. Intersegmental step between segment IX and segment X almost absent. Segment X short, nearly quadrangular, with concave dorsal margin near apex; apex pointing posterad ( Fig. 344). Setaless mesocaudal lobe narrowly convex in dorsal view ( Fig. 346); together with apicoventral setal lobes being arrow-shaped in dorsal view. Apicoventral setal lobes fused with segment X along posterior margin, delineated by setae, visible as setose bulge; with geniculate apicoventral corners ( Fig. 344). Lateral setose areas forming pair of elevated warts near centre of segment X, clearly visible in dorsal and lateral view ( Fig. 344, 346); apices slightly exceeding lateral margins of segment X ( Fig. 346). Dorsal and lateral interlobular gaps absent. Transverse sutures nearly straight, dividing segment X into less sclerotised basal part and more strongly sclerotised distal part. Short, less sclerotised longitudinal sutures present ventrally on segment X, fusing with transverse sutures; forming continuation of apicoventral setal lobes ( Fig. 344). Coxopodites robust, exceeding well beyond apex of segment X; straight along their lengths in lateral view ( Fig. 344), curving mesad in ventral view ( Fig. 347); in lateral view dilating apicad, nearly parallel-sided in ventral view. Harpagones flattened laterally, broadly triangular in lateral view; slender, slightly tapering in ventral view ( Fig. 347), with two setae at apex (not illustrated). Phallotheca ( Fig. 348) slightly narrowing towards mid-length before broadening apically; sclerotised endothecal process rounded, but slightly produced ventrad, phallotremal sclerites sickle-shaped, vestigial ventral endothecal membranous lobe not visible.

Holotype male: INDIA: North Dehra Dun , Suswa Nadi, 1.iii.1936 [J. A. Graham] ( BMNH, in alcohol).

Distribution: India.

Etymology: after the type locality.