Lepidostoma garhwalense, Parey & Saini, 2012

Parey, S. H. & Saini, M. S., 2012, Four New Species Of Genus Lepidostoma Rambur (Trichoptera: Lepidostomatidae) From India, Acta Zoologica Academiae Scientiarum Hungaricae 58 (1), pp. 31-40 : 32-34

Lepidostoma garhwalense sp. n.

( Figs 1–6 )

Description: Colour dark brown. Scapes ( Fig. 5 ) each 1.0 mm, short and slightly curved at middle, with single subbasal process dorsally. Maxillary palps ( Fig. 5 ) each 0.97 mm, two-segmented, 1st segment broad, 2nd segment slender and densely covered with hair, both segments curved dorsad. Length of each forewing 6.9 mm. Wing venation as in fig. 6

Male genitalia ( Figs 1–4 ): Segment IX apicodorsally produced into triangular process. Distal margin of segment X produced into paired dorsolateral and mesal processes: Dorsolateral processes broad at base and apically triangular, mesal processes simple and with truncate and serrate apices, separated from each other by narrow, U-shaped excision nearly reaching tergum IX; when seen laterally mesal processes each appearing as rounded structure having serrated upper edge and non-serrated lower edge. Inferior appendages each 1-segmented, apically branched, branches of subequal length, lateral branch apically rounded, inner one truncate; basodorsal process slender, cylindrical, with serrated dorsal and ventral edges, half as long as inferior appendage. Phallus with phallobase round, phallicata broader and truncate apically.

Diagnosis: The male of this species closely resembles that of Lepidostoma tesarum MOSELY, but differs from the latter by having segment IX more triangular apicodorsally, not rounded. Segment X dorsolateral processes are broad basally, not narrow, and they are apically triangular, not pointed; mesal processes are truncate with serrated dorsal edges, not rounded and without any serration. The phallicata is apically truncate, not rounded. The basal process of each scape is very prominent, not reduced. Both segments of the maxillary palps are curved dorsad and C-shaped, not almost upright as in L. tesarum. The wings of this species resemble those of Lepidostoma destructum ULMER.

Material : Holotype male, India: Uttrakhand, Gairsain, 2500 m, 16-vi-2009 ( MDZPUP).

Female and immature stages: Unknown.

Etymology: This species is named after the Garhwal Hills in which its type locality is situated.

Figures

Figs 1–6. Lepidostoma garhwalense sp.n.: 1 = male genitalia, dorsal view; 2 = male genitalia, ventral view; 3 = male genitalia, left lateral view; 4 = phallic apparatus, left lateral view; 5 = head, scape, and palps, right lateral view; 6 = right forewing, dorsal view. BDP = basodorsal process; IF = inferior appendage; IX = segment IX; MP = maxillary palp; P = phallus; PCF = postcubital fold; PM = parameres; S = scape; X = segment X