Chimarra gangtokensis, Kaur & Garima & Pandher, 2020

Kaur, Simarjit, Garima, Deepti & Pandher, Manpreet Singh, 2020, New Species and New Records of Caddisflies (Insecta: Trichoptera) from India, Zootaxa 4747 (2), pp. 350-360 : 351

Chimarra gangtokensis sp. nov.

( Figs. 1–5 )

Material examined. Holotype: Male, India: Sikkim; Gangtok , 27 ° 19’49.764” N, 88 ° 36’48.772” E, 1800 m, 17.v.2011, Pandher & Parey ( NPC).

Paratype. 1 male, collection data same as of holotype.

Diagnosis. Chimarra gangtokensis sp. nov. is similar to C. talos Malicky 2007 , C. nahesson Kimmins 1964 , and C. megara Malicky 2007 due to the presence of long, pointed, sclerotized lateral lobes of tergum X in lateral view. Chimarra gangtokensis is most similar to C. megara in the general structure of male genitalia. However, in C. gangtokensis sp. nov. segment IX has its posterolateral margins produced and subtriangular, and the arms of the mesal lobe of tergum X are long and curved dorsad apically, whereas in C. megara segment IX has its posterolateral margins slightly convex and the arms of the mesal lobe of tergum X are directed posterodorsad and are not curved apically. Moreover, there is a distinct difference in the shape and number of endothecal spines.

Description. Adult male, color in alcohol black, dorsum of head black, wings fuscous. Body covered with black and scattered pubescence. Length from tip of head to apices of folded forewings about 6.25 mm; antenna each 4.25 mm long; maxillary palps each 1.25 mm long, its segment III slightly longer than II; labial palps each 0.70 mm long. Length of each forewing 5 mm; discoidal cell about 2 times as long as its width. Length of each hind wing 3.75 mm.

Male genitalia ( Figs. 1–5 ). Segment IX with tergum very reduced mesally and produced anterad submesally; anterolateral margins concave; anteroventrally much produced; posterolateral margins produced and subtriangular medially; posteroventral process present. Preanal appendages angled obliquely posterodorsad, setose, semicircular in lateral view; globular in dorsal view. Inferior appendages longer than tergum X, almost uniformly wide, each gradually narrowing towards apex, setose in lateral view; in ventral view wide basally, constricted medially on outer edge; mesally with three preapical dents and pointed apically. Tergum X with divergent pair of sclerotized lateral lobes and convergent pair of projecting mesal lobes: each lateral lobe wide basally, down-curved at midlength and slender towards pointed apex, with multiple sensilla in lateral view; in dorsal view wide sub-basally, distal 2/3 gradually tapering with slightly concave outer edge towards pointed apex; mesal lobes directed posterodorsad, narrow at base, wide medially, narrow towards apex, hooked dorsad in lateral view; digitate, smaller than lateral lobes in dorsal view. Phallobase rounded and sclerotized; endotheca tubular, length not discernable, with 2 lateral rows of small comb-like spines and pair of large, long, laterally directed spines visible in ventral view.

Distribution. India: Sikkim.

Etymology. This species is named after the type locality Gangtok.

Figures

FIGURES 1–5. Chimarra gangtokensis sp. nov., male genitalia. 1, left lateral; 2, dorsal; 3, right inferior appendage, ventral; 4, phallus, left lateral; 5, phallus, ventral.