Hydromanicus truncatus Betten

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 : 31

Hydromanicus truncatus Betten

Fig. 38–41

Hydromanicus truncatus Betten, 1909: 235 .

Type locality. India (Bengal) .

New Records. INDIA: Meghalaya, Khasia Hills - 2 males (Nat. Coll. McLachlan, Coll. B.M. 1938-674, NHML) ; Assam, Kameng, Amatulla , 11.iii.1961 [F. Schmid] - 1 male ( ROM, pinned with cleared abdomen in plastic genital vial) .

Male. Body and wings brown. Forewing membrane medium brown with maculation pattern, pale stripe present on anterior margin of forewing median cell. Sternum V without visible lobe or protuberance. Maxillary palp formula I-( II, III, IV)- V, segment V as long as length of segments I– IV together. Head dorsum dark brown, with 7 dark brown setal warts. Swollen setal wart absent on proepisternum. Small setal wart present on precoxale (proepisternum). Pretarsal claw asymmetrical, laterally flanked by setal bundle. Spur formula 244. Protibia with posteroapical spur equal to anteroapical spur.

Wings. Venation typical for the genus. Forewing crossveins m-cu and cu separate. Sc and R separate before costa. Cu2 and A fusing before wing margin. Hind wing Sc and R meeting before costa at crossvein r. Stem of M and Cu1 separate. Median cell open. Fork 1 present. Forewing length 11.2 mm.

Male genitalia. Abdominal segment IX fused annularly. Slightly two-partite, longitudinal suture visible at dorsal end of broad apical lobe ( Fig. 38); almost dividing segment IX into large ventral and small dorsal part. Median keel narrow, dorsally and laterally granulose apex open in dorsal view ( Fig. 39); anterior margin arciform, dorsum with keel shifted posterad. Antecosta forming single line narrowing dorsally before margin, with external groove of antecostal suture. Apical lobe on posterolateral margin very broad, rounded. Posterior spine row continuous on broad apical lobe and on two-partite dorsal lobe to median keel. Depression between segments IX and X shallow, stepwise. Segment X long, narrow, with capitate apex in lateral view ( Fig. 38); in dorsal view ( Fig. 39) broad, with pronounced triangular, lateral protuberances. Preanal appendages forming long processes being broadest at mid-length, covered by setae nested in elevated alveoli. Apicoventral setose lobes forming pair of digitiform and capitate processes; slightly down-curving in lateral view; straight in dorsal view; bearing setae on dorsal surfaces. Dorsal interlobular gap narrow, deep ( Fig. 39); demarcated by apicoventral digitiform processes. Apicodorsal setose lobes reduced into pair of small, setose, longitudinal surfaces between triangular lateral protuberances ( Fig. 39); smooth cavity on segment X invisible. Longitudinal sutures running along dorsal part of segment X, visible in lateral and dorsal view. Coxopodite long, slen- der, straight, without significant apically broadening. Each harpagones with two-lobes, median lobes larger than lateral lobes ( Fig. 40). Phallic apparatus ( Fig. 41) basal part curving ventrad, right angled; anterior part of horizontal phallotheca very broad, slightly broader than basal part; narrowing gradually before apical ventral keel. Phallotheca ending distally in regularly circular, sclerous, endothecal process. Median rim thickened, incurving; pair of small, irregular, phallotremal sclerites located in middle position beneath sclerous, endothecal process. Endophallus with shape of phallotheca ending anteriorly in narrow, ventrad curving tube with gonopore; broadly rounded, half-ovoid, sub-apical ventral keel dominating apex of phallotheca in lateral view. Remarks: As the holotype of this species is not available, 3 specimens collected in different regions but not far from the type locality, permit us to re-describe the species. The specimens from the 2 new localities, Khasia Hills in Meghalaya and Kameng in Assam, have slightly different length ratio between the lobes on the harpagonal apices.