Hydropsyche minutanga Oláh & Johanson, 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 : 115-117

Hydropsyche minutanga Oláh & Johanson , new species

Fig. 188–192

This species is similar to H. ditalon Tian & Li from Tibet, especially in segment X and the phallothecal terminalia. However, peculiar differences distinguish the new species: H. minutanga has slightly depressed dorsal margins of segment IX and dorsally enlarged apicodorsal setose ridges. In addition, the apical lobes are rounded, not triangular; the short, deep intersegmental depression is oblique anteriorly, not vertical; the coxopodites both exceeding the apex of segment X; and the harpagones are broad at basal half in ventral view.

Male. Body and wings brown with light pubescence. Forewing membranes brown with distinctly and uni- formly pale spotted. Maxillary palp formula I-II-(III, IV)-V, segment V as long as sum of segments I–IV. Head dorsum brown, with 9 brown warts. Swollen setal wart present on proepisternum. Pretarsal claws asymmetrical, laterally flanked by setal bundle. Spur formula 244. Protibiae both with posteroapical spur equal to anteroapical spur.

Wings. Venation typical for the genus. Forewing crossveins m-cu and cu separate. Forewing Sc and R fusing immediately before costa. Cu2 and A separate along their lengths. 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 12.4 mm, hind wing length 9.3 mm.

Male genitalia. Abdominal segment IX fused annularly, its dorsum depressed into obliquely straight line together with posteriorly shifted median keel ( Fig. 188); in dorsal view median keel parallel-sided and straight-cut apically, with minute, central hump ( Fig. 189); dorsal and lateral surfaces granulose; anterior margin arciform with straight dorsum; ventrum short, dorsum longer than ventrum ( Fig. 188). Antecosta both well developed, forming double line, narrowing dorsally before margin and to median keel ( Fig. 188); external groove of antecostal suture present. Apical lobe on posterolateral margins well developed, rounded ( Fig. 188). Posterior spine rows present, except on dorsal part of apical lobes. Depression between segments IX and X very short deep, oblique anteriorly, not vertical, drawn basal due to depression of dorsum IX. Body of segment X large, nearly quadrangular in dorsal view ( Fig. 189). Lateral setose areas (preanal appendages) forming small humps with group of alveoli; located distally on each side of segment X, each forming compact patch of pale area and distally scattered setae. Apicoventral setose lobes forming pair of stout, slightly ventrad curving, digitiform processes with apical setae, directed posteromesad ( Fig. 189). Dorsal interlobular gap long, ovoid, encircled by apicoventral setose lobes. Apicodorsal setose lobes fusing with setose ridge, or crest; elongated dorsally; shifted anteriorly to intersegmental depression; setae arranged in rows on both sides ( Fig. 189); smooth cavity on segment forming large, shallow depression, occupying basal part of segment X; each side with short, wide, darkly pigmented transverse suture running ventrally from bottom of intersegmental depression; in dorsal view crossing segment X at intersegmental depression ( Fig. 189). Longitudinal suture on each side encircling ventral part of shallow cavity. Coxopodites exceeding apex of segment X; dorsal margins weakly sinuous; slightly dilating distally from mid-length; nearly straight in ventral view ( Fig. 190). Harpagones slightly curving dorsad, nearly parallel-sided ( Fig. 188), narrowing distad in ventral view ( Fig. 190). Phallic apparatus simply bent, with well developed, ventrad curving and broadening basal part ( Fig. 191). Dorsal margin of phallotheca strongly curving. Endophallus attached to dorsal wall of phallotheca, reaching bend of phallic apparatus, filling half phallotheca. Phallotremal sclerites well separating into pair of slender claw-like processes with thin and tapering apical half; falciform in lateral view; pincer-shaped in ventral view ( Fig. 192). Pair of sclerous, endothecal processes arise from lateral side of phallotremal sclerites, dorsal lobe large. Sclerotized ventral process of phallotheca slightly shorter than phallotremal sclerites, with bilobed apex ( Fig. 192).

Holotype male: INDIA: Mishmi Hills , Minutang, 3 900 ft. 20.ii.1935 [M. Szeele], (Brit. Mus. 1935-312) (in alcohol).

Paratypes: same data as holotype - 2 males (Brit. Mus. 1935-312) ; ditto, except Chwaglon 5350 ft, 6.ii.1935 [M. Steele] - 1 male (Brit.Mus. 1935-312) .

Distribution. India (Arunachal Pradesh).

Etymology. minutanga , named after the type locality, Minutang.