Lepidostoma trilobatum, Parey, Sajad H., Morse, John C. & Pandher, Manpreet S., 2016

Parey, Sajad H., Morse, John C. & Pandher, Manpreet S., 2016, Three new species of the genus Lepidostoma Rambur (Lepidostomatidae: Trichoptera) from India, Zootaxa 4136 (1), pp. 181-187 : 182

Lepidostoma trilobatum sp. nov.

( Figs. 1–6 )

Male: Scapes each 0.8 mm long, simple without subbasodorsal processes, 3 times as long as head ( Fig. 5 ). Maxillary palpi each 0.95 mm long, 2-segmented, first segment shorter than second, nearly rectangular, second segment apically curved into pointed tip ( Fig. 5 ). Average length of each forewing 6.79 mm (n = 4). Wings covered with short scales, forewings without anal grooves ( Fig. 6 ).

Genitalia ( Figs. 1–4 ): Segment IX broad, with two pairs of setal tufts, dorsomesal pair and posterolateral pair. Segment X divided into two processes directed posterad, each process broad and with small triangular dorsal projection near base, apically bidentate, setose, with one point lateral and one mesal ( Fig. 1 ); in lateral view having blunt angle near midlength of dorsal margin, finger-like apicodorsal process, and 3 small subapicoventral indentations ( Fig. 3 ). Inferior appendages each very wide near base and apically 3-branched, lateral process pointed, other two processes rounded apically; basodorsal process lobiform and visible only in dorsal view. Phallic apparatus thick, membranous at apical half, ending in blunt upturned projection; parameres absent.

Etymology. Latin adjective “ trilobatum ” = 3-lobed, with reference to the three apical lobes of each inferior appendage.

Material examined. Holotype ♂; INDIA: Arunachal Pradesh, Jung, 2200 m, 18-v-2011, collectors Parey & Pandher (in ethanol) (ZSI). Paratypes: Same data as holotype, 1 ♂; Lumpo, 2200 m, 17-v-2011, collectors Parey & Pandher, 2 ♂ (RTCPPPM, SKUAST-K). Himachal Pradesh, Khajjiar, 1800 m, 18-vi-2011, collectors Parey & Pandher, 2 ♂ (RTCPPPM, SKUAST-K).

Diagnosis. This species resembles Lepidostoma heterolepidium ( Martynov 1936) , but differs by having the dorsal processes of segment X bidentate apically, each process with a small triangular process near the base ( Fig. 1 ) and the phallicata has a blunt upturned projection apically.

Figures

FIGURES 1 – 6. Lepidostoma trilobatum sp. nov. 1 – 4, genitalia: 1, dorsal; 2, ventral; 3, left lateral; 4, phallic apparatus, left lateral. 5, head with maxillary and labial palps and antennal scape, right lateral; 6, right forewing, dorsal. IX = segment IX, X = segment X, IF = inferior appendage, BDP = basodorsal process, PH = phallic apparatus, S = scape, MP = maxillary palp.