Hydropsyche khasigiri Oláh & Barnard, 2008

Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), Zootaxa 1802, pp. 1-248 : 101-102

Hydropsyche khasigiri Oláh & Barnard , new species

Fig. 154–158

This species is similar to H. baubo Malicky & Chantaramongkol from Thailand, especially in the shape of segments IX and X. Hydropsyche khasigiri , new species is unique in having shallow and narrower intersegmental depression; the apicoventral setose processes are shorter and not tapering; the harpagones are broadening apicad, not narrowing as in H. baubo ; and the sclerous endothecal process is bifid, and armed with a shorter dorsobasal arm.

Male. Large, body and wings brown with light pubescence. Forewing membrane uniformly brown without pattern. Maxillary palp formula I-II-(III, IV)-V, segment V as long as segments I–IV together. Head dorsum dark brown, with 9 dark brown setal warts. Swollen setal wart present on proepisternum. Each pretarsal claws asymmetrical, laterally flanked by setal bundle. Spur formula 244. Both protibia with posteroapical spur smaller than anteroapical spur.

Wings. Venation typical for the genus. Forewing crossveins m-cu and cu separate. Sc and R, and Cu2 and A running separate before costa. Hind wing Sc and R meeting before costa at crossvein r. Stem of M and Cu1 running closely. Median cell closed. Fork 1 present. Forewing length 11.0 mm, hind wing length 7.0 mm.

Male genitalia. Abdominal segment IX fused annularly. Median keel long, gradually narrowing, sharply triangular, almost tapering in dorsal view ( Fig. 155); dorsal surface granulose; lateral surfaces flat, glabrous; anterior margin arciform; ventrum short; dorsum 2 times longer than ventrum ( Fig. 154). Antecosta well developed into double line; narrowing dorsally before margin; with external groove of antecostal suture. Apical lobe on posterolateral margins broad, triangular ( Fig. 154). Posterior spine row intermittent with long break at segment X ( Fig. 154); with 3–4 setae immediately below median keel and on apical lobes. Depression between segments IX and X shallow, short. Body of segment X basally short in dorsal view ( Fig. 155); basally long, nearly triangular in lateral view ( Fig. 154); rounded quadrangular in dorsal view; constricting slightly basad. Lateral setose areas (preanal appendages) present centrally and distally, forming anterior, well delineated, pale patch and more diffused, loosely packed, groups of setae on distal margin. Apicoventral setose lobes modified into pair of short, digitiform processes with setae restricted to apex; very short, not narrowing apically ( Fig. 154). Dorsal interlobular gap narrow, deep ( Fig. 155). Apicodorsal setose lobe forming anterior setose ridge, or crest; shallow, smooth cavity on segment X present; short, wide, darkly pigmented transverse suture running ventrally on each side from bottom of intersegmental depression ( Fig. 154), in dorsal view visible as prominent suture crossing middle of segment X ( Fig. 155). Longitudinal suture running anteriorly of lateral setose area. Coxopodites slightly exceeding apex of segment X; each with dorsal margin with basal half slightly sinuous; dilating distally from mid-length; nearly straight in ventral view ( Fig. 156). Harpagones curving dorsomesad ( Fig. 154, 156); nearly parallel sided. Phallic apparatus simply bent ( Fig. 157); flat due to shortened, ventrad curving basal section; broadening only along ventrad curving part. Phallotheca with straight dorsal margin, except curving dorsad immediately before apex. Endophallus attached to dorsal wall of phallotheca, reaching over to phallic apparatus bend. Phallotremal sclerites falciform, broad. Pair of bifid, sclerous endothecal processes, armed with short, dorsobasal arm ( Fig. 157). Sclerous ventral process of phallotheca much shorter than phallotremal sclerites ( Fig. 158); in ventral view with rounded bifid apical margin.

Holotype male: INDIA: Khasia Hills [McLachlan] (B.M. 1938-674)

Distribution. India.

Etymology. khasigiri , from Khasia in Sanskrit, named after the type locality.