Hydropsyche pulakita, Oláh & Johanson, 2010

Oláh, János & Johanson, Kjell Arne, 2010, Fifteen new Trichoptera (Insecta) species from Sumatra, Indonesia, Zootaxa 2618 (1), pp. 1-35 : 22-24

Hydropsyche pulakita , new species

Figs 42–46

This species is close to H. saranganica Ulmer from Java, from which it differs by having sharply triangular apicolateral lobes on segment IX, not rounded-triangular; the reduced pair of dorsoapical processes located near the intersegmental lateral profile, which are well developed in H. saranganica ; the ventral corner of the basal part of each harpago is rounded, not angled in lateral view; and the terminal sclerotized spines of the dorsolateral membranous endothecal processes originating from a broad basal plate, and not forming short spines originating from the membrane.

Male. Body dark brown with light pubescence. Maxillary palp formula I-(III,IV)-II-V. Dorsum of head brown, with 9 warts of same colour. Swollen setal wart present on proepisternum.

Pretarsal claws asymmetrical, each with laterally flanked setal bundle. Spur formula 2,4,4; fore tibiae each with posteroapical spur smaller than anteroapical spur.

Forewings dark brown with lighter pubescence; membranes speckled with lighter spots. Venation typical for genus. Forewing length 8.0 mm; crossveins m -cu and cu separate; Sc and R, and Cu2 and A separate from C. Hind wing Sc and R meeting before Costa anterior of crossvein r; stems of M and Cu1 running close to each other; median cell closed; fork 1 present.

Male genitalia. Segment IX fused annularly, short; median keel very broad, with granulose dorsal and smooth glabrous lateral surfaces; keel representing entire dorsum of segment IX, shifted posteriorly; anterior margin arciform, with short ventrum and long dorsum; antecosta well developed, narrowing dorsally and ventrally. External groove of antecostal suture well developed. Apical lobes on posterolateral margins acutely triangular. Posterior spine row intermittent, present on lower part of keel slope and triangular apical lobe, absent between. In lateral view, area between segment IX and segment X shallow, almost filled; delineated by distal end of keel and vestigial dorsoapical setose process. Segment X short, triangular in lateral view, rounded quadrangular in dorsal view. Cerci located ventrally, with compact, light patch; scattered setae present distally. Ventroapical setose lobes long, slender, with apical setae; curving ventrad in lateral view; curving mesad in dorsal view, with separate apices. Dorsal interlobular gap encircled by slender ventroapical setose lobes at wide, central area; anterior base of gap rounded. Dorsoapical setose lobes vestigial, forming mesal warts; shifted anteriorly to shallow slope of intersegmental area. Unsetose depression on basal half of body of segment X shallow; sutures indiscernible. Coxopodites as long as apex of segment X; dorsally sinuous at basal half; dilating distally from mid-length. Harpagones each with broad, short base, continuing dorsally into filiform distal part; ventral corner of basal part rounded. Phallic apparatus simply bent; broad along ventrad-curving basal section. Phallotheca with almost straight dorsum. Endophallus forming wellpigmented, narrow tube, exceeding bend. Basis of phallotremal tongue straight, flat in lateral view; distal elongation more slender than pair of membranous apical lobes of endothecae. Short sclerotised terminal spines of dorsolateral membranous endothecal processes with broad basal plate.

Holotype male: INDONESIA (Sumatra): Bukit Barisan Selatan National Park, Barisan Mts., Way Pitias , 800 m, 17–19.vi.2008, light trap [J. Oláh, Jr.] — 1 male (OPC, in alcohol).

Distribution: Indonesia (Sumatra).

Etymology: Pulakita, “bristle” in Sanskrit, referring to the strong bristles present on the apicolateral lobes of segment IX.

Figures

FIGURES 42–46. Hydropsyche pulakita, new species, holotype. 42—genitalia, left lateral; 43—genitalia, dorsal; 44— right gonocoxite, ventral; 45—phallic apparatus, left lateral; 46—phallic apparatus, apex, dorsal.