Hydropsyche januha 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 : 58-59

Hydropsyche januha Oláh & Barnard , new species

Fig. 79–83

This species is similar to H. dhusaravarna Schmid , especially in the presence of a bilobed apical, membranous endothecal process of the phallus; basally broad harpagones; and broad apical lobes of segment IX. Both species have large falcate and anteriorly directed spines on the endotheca. Hydropsyche januha differs from H. dhusaravarna , and can readily be distinguished from it, in having more strongly developed and longer api- codorsal setose lobe, and by the presence of geniculate, apicoventral setose processes on segment X. Moreover H. januha has 1 pair, and H. dhusaravarna has 2 pairs of large falcate spines on the endotheca.

Male. Body and wings dark brown, forewing membrane brown with slight, distinct light spots apically from anastomis. Maxillary palp formula I-II-(III, IV)-V, segment V as long as length of segments I–IV together. Head dorsum dark brown, with 9 dark brown setal warts. Proepisternum with swollen setal wart. Pretarsal claw asymmetrical, laterally flanked by setal bundle. Spur formula 244. Protibia with posteroapical spur as long as anteroapical spur.

Wings. Venation typical for the genus. Forewing crossveins m-cu and cu separate. Sc and R, and Cu2 and A, separate before costa. Hind wing Sc and R meet before costa at about crossvein r. Stem of M and Cu1 close. Median cell closed. Fork 1 present. Forewing length 9.0 mm, hind wing length 6.9 mm.

Male genitalia. Abdominal segment IX fused annularly; very short. Median keel triangular with dorsally and laterally granulose, apex tapering in dorsal view ( Fig. 79). Anterior margin arciform; dorsum slightly shifted posterad. Antecosta well developed, forming single line narrowing dorsally before margin. External groove of antecostal suture present. Apical lobe on posterolateral margin forms large, rounded lobe ( Fig. 79). Posterior spine row intermittent, scarce at segment X, absent on dorsum, very dense on apical lobe. Depression between segments IX and X acutely triangular. Body of segment X short; nearly quadrangular in lateral view( Fig. 79); rounded quadrangular in dorsal view ( Fig. 80). Lateral setose areas(preanal appendages) forming by 2 areas; compact in ventral position ( Fig. 79); additional area present distally, with diffuse, loosely packed, group of setae distributed to margin in lateral view. Apicoventral setose lobes modified into pair of digitiform, geniculate processes with dorsal setae. Dorsal interlobular gap wide, diverging, encircled by apicoventral digitiform processes and complex of apicodorsal, setose lobe near gap basis. Apicodorsal setose lobe elongating vertically in lateral view ( Fig. 79); tripartite by presence of short humps in dorsal view ( Fig. 80), middle hump smooth; smooth cavity present on segment X. Short, darkly pigmented, transverse sutures running ventrad from bottom of intersegmental depression. Ventral part of longitudinal suture encircling smooth cavity. Coxopodites long, slender, slightly sinuous basally; slightly dilating distad from mid-length; in ventral view ( Fig. 81) narrowest at one-third its length; nearly straight. Harpagones with broad bases; slender, digitiform distally; slightly S-shaped in lateral view ( Fig. 79); almost straight in ventral view ( Fig. 81). Phallic apparatus ( Fig. 82, 83) simply bent; broadening strongly along ventrad curving basis. Phallotheca slightly concave. Endotheca with long, apical, membranous processes with weakly separated bilobed apex ( Fig. 83); each lobe with pocket armed with 3–4 spines; erectile apical lobe dominating terminalia when fully erected; terminal half of endotheca with 3 pairs short, stout spines located dorsolaterally on shorter lobes ( Fig. 82, 83); basal half of endotheca with 1 pair large, clavate spines curving basally and ventrally, accompanied dorsally by pair of shorter, stout spines ( Fig. 82, 83). Large dorsal lobe superimposed of lower complex, housing endophallus of narrow tube; terminates in sclerite complex around phallotrema; with pair of ventrad and posterad curving phallotremal sclerites. Border of lower endothecal lobe with 5 pairs, differently sized, spines ( Fig. 82, 83); distal process of upper dorsal endothecal lobe with endophallus , phallotrema and phallotremal sclerite complex, depending on state of erection. In holotype, erection less prominent, with separation not clear. Paratype from Manipur with strong erection and clear separation.

Holotype male: INDIA: Khasia Hills, McLachlan Coll. (B.M. 1938-674).

Paratypes: INDIA: Meghalaya, Khasi Hills, U.J.K.H. Umsawmat, 5.x.1960 [F. Schmid] - 1 male ( ROM, pinned with cleared abdomen in plastic genital vial) ; Manipur, Lushat , 10.vii.1960 [F. Schmid] - 1 male ( ROM, pinned with cleared abdomen in plastic genital vial) .

Distribution. India.

Etymology. januha , knee in Sanskrit, named after the knee-shaped, geniculate shape of the apicoventral setose process on segment X.