Lepidostoma dirangense, Saini, Malkiat S. & Parey, Sajad H., 2011

Saini, Malkiat S. & Parey, Sajad H., 2011, Four new species of the genus Lepidostoma Rambur (Trichoptera: Lepidostomatidae) from the Indian Himalayas, with a checklist to its Indian species, Zootaxa 3062, pp. 25-36 : 28

Lepidostoma dirangense sp. nov.

( Figs. 13–19 )

Male: Dark brown. Scapes ( Figs. 18–19 ) each 1.44 mm, with single basal process. Maxillary palps ( Fig. 19 ) each 1.12 mm, 2-segmented, equal in size, apical segment dilated. Length of each forewing 9.7 mm. Wing venation and setae as in Fig. 17 .

Male genitalia ( Figs. 13–16 ): Segment IX triangular dorsally. Segment X deeply excised at its centre to base, each half divided 3/4ths to base, resulting in 4 lobes, lateral lobes with apices dilated, middle lobes slightly shorter than lateral lobes and apically pointed in dorsal view. Inferior appendages each single segmented, with 3 branches: apex of main branch long, slender to dilated apex, curved mesad and sometimes crossing its counterpart; second branch (probably second article) short and sometimes crossing its counterpart; and slender basodorsal process directed dorsad. Phallus with slightly notched apex in ventral view, membranous, phallobase dilated, phallicata slender, parameres short.

Diagnosis. This species somewhat resembles Lepidostoma tesarum Mosely , of the L. ferox Branch , but differs from the later by segment X having dorsolateral processes slightly longer and dilated apically, and dorosomesal processes triangular. Dorsally the inferior appendages each have the main branch long and clubbed apically. Maxillary palps each have the 2nd segment club-shaped. The postcubital fold of the forewing is long, almost touching the wing margin.

Etymology. The name of the species is based on the locality “Dirang” from where the type specimen was collected.

Material examined. Holotype 3 INDIA: Arunachal Pradesh, Dirang, 1600 m, 07-x-2010. Material deposited in the Museum of the Department of Zoology, Punjabi University, Patiala. India.

Figures

FIGURES 13 – 25. Lepidostoma species. Figs. 13 – 19, Lepidostoma dirangense sp. nov. 13, 3 genitalia, dorsal view; 14, 3 genitalia ventral view; 15, 3 genitalia, left lateral view. 16, phallic apparatus, left lateral view; 17, right forewing, dorsal view; 18, left maxillary palp, dorsal view; 19, head, scape and palps, right lateral view; Figs. 20 – 25, Lepidostoma meghalayaense sp. nov.: 20, 3 genitalia, dorsal view; 21, 3 genitalia, ventral view; 22, 3 genitalia, left lateral view; 23, phallic apparatus, left lateral view; 24, right forewing, dorsal view; 25, head, scape and palps, right lateral view.