Lepidostoma ahlae, 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 : 36-39

Lepidostoma ahlae sp. n.

( Figs 19–24 )

Description: Colour dark brown. Scapes ( Fig. 19 ) each 4.85 mm in length, with two small subbasal processes dorsally. Maxillary palps ( Fig. 23 ) each 1.94 mm, two-segmented, basal segment much longer, apical one with pointed apex, both segments covered with dense setae. Average length of each forewing 7.7 mm. Wing venation as in Figure 24 .

Male genitalia ( Figs 19–22 ): Segment IX apicodorsally produced into somewhat rounded tip. Segment X with dorsolateral plates broad at base, apically rounded; mesal processes narrow, situated closely to one another with small space between them; in lateral view dorsolateral plates triangular, apically rounded, with slightly serrate ventral margins, mesal processes somewhat dome-shaped, with very broad bases. Inferior appendages each two-segmented, 1st segment broad at base and narrower towards its apex, 2nd segment short with truncate apex; basodorsal processes absent. Phallus with phallobase and phallicata slender, cylindrical in lateral view. Parameres about as long as phallus and with two paramere spines closely adjacent to one another. Wing venation of this species ( Fig. 24 ) similar to that of L. inerme.

Diagnosis: The male of this species resembles that of Lepidostoma inerme MCLACHLAN but differs from it by having the dorsolateral processes of segment X in dorsal view rounded, not finger-like, and the mesal processes apically fingerlike, not truncate; when seen laterally, each mesal process appears dome-shaped, not pointed, and each lateral process is rounded, not lobed. Scapes of this species each have two small subbasal processes but those of L. inerme are without any processes. Maxillary palps of this species have the 2nd segment apically tapering, not apically rounded.

Material: Holotype male, India: Himachal Pradesh, Ahla , 2000 m, 11-vii-2010, S. H. Parey ( MDZPUP).

Paratypes, India: Jammu and Kashmir, Pahalgam , 3100 m, 28-viii-2008 ; Yusmarg , 2800 m, 01-viii-2009, 2 males ( MDZPUP) .

Female and immature stages: Unknown.

Etymology: The species name is after its type locality Ahla (Himachal Pradesh).

Figures

Figs 19–24. Lepidostoma ahlae sp. n.: 19 = male genitalia, dorsal view; 20 = male genitalia, ventral view; 21 = male left lateral view; 22 = phallic apparatus, left lateral view; 23 = head, scape and palps, right lateral view; 24 = right forewing, dorsal view