Lepidostoma Rambur, 1842

Parey, Sajad Hussain, Received, Malkiat Singh Saini & Online, Published, 2013, Two new species and 2 first records of the genus Lepidostoma Rambur, 1842 (Trichoptera: Lepidostomatidae) from the Indian Himalayas, Turkish Journal of Zoology 37 (6), pp. 768-772 : 769

Genus Lepidostoma Rambur, 1842

Type species: Lepidostoma squamulosum Rambur, 1842: 493–494 (designated by Ross, 1944).

Lepidostoma curvatum sp. nov. (as shown in Figures 1 –6)

Male in alcohol brown, head densely covered with dark brown hairs. Antennal scapes (Figure 5) each 2.4 mm (n = 1) long, with a single basal process. Maxillary palps (Figure 5) each 0.96 mm (n = 1), 2-segmented, basal segment longer than distal segment, both segments curved upward into c-shaped structure; distal segment hidden by long tuft of setae. Forewings each with venation (Figure 6), pseudocell as long as anal groove.

Male genitalia (as shown in Figures 1 –4): Segment IX annular, roundly produced in middle of posterodorsal and posteroventral margins ( Figures 1 and 2); anterolateral and posterolateral margins nearly straight, parallel in lateral view (Figure 3). Segment X deeply and widely excised at its center, forming pair of plates, each plate broad at its base with dorsolateral process slightly longer and pointed, whereas dorsomesal process with rounded apex, both apices bearing long setae ( Figure 1); laterally segment X rounded, its upper surface with irregular bumps bearing long setae, dorsolateral process of segment X triangular, projecting from center of this segment (Figure 3). Inferior appendages each rectangular, apices branched, branches nearly equal in length, basodorsal process of each inferior appendage nearly cylindrical, apex slightly enlarged, apically pointed. Phallicata apically dilated and phallobase truncate in lateral view; 2 parameres long, nearly straight, and subparallel, nearly as long as phallicata.

Diagnosis: The new species is a species of the Lepidostoma ferox branch ( Weaver, 2002), with an anal groove and pseudocell in the male forewing. The male of this species resembles that of Lepidostoma assamense ( Mosely, 1949b) , but it can be differentiated from the latter by having the single basal process of each antenna very short and adjacent to the eye (longer and one-third distance from the eye of L. assamense ); the male forewing vein Cu1 is separate from the fold of Cu2 from the wing base (these veins are combined in a fold from the wing base in L. assamense ); segment X is longer than in L. assamense and its dorsolateral processes are pointed (rounded in L. assamense ).

Female: Unknown.

Etymology: This species name pertains to the distinctly curved basal segment of each maxillary palp.

Material examined: Holotype male INDIA: Arunachal Pradesh; Tato, 3200 m, 28-iv-2010, collector Sajad H Parey. Holotype deposited in the Museum of Zoology and Environmental Sciences, Punjabi University, Patiala, India .