Chimarra sikkimensis, Pandher, Manpreet Singh & Saini, Malkiat Singh, 2012

Pandher, Manpreet Singh & Saini, Malkiat Singh, 2012, Seven new species of the genus Chimarra Stephens (Trichoptera: Philopotamidae) from India, Zootaxa 3478, pp. 313-329 : 320

Chimarra sikkimensis sp. nov.

( Figs. 14–16 , 38–39 , 48–49 )

Diagnosis: The male genitalia of this species resemble those of Chimarra rama Malicky & Chantaramongkol 1993b , C. devva Malicky & Chantaramongkol 1993b , C. shiva Malicky & Chantaramongkol 1993b , C. atara Malicky & Chantaramongkol 1993b , and C. momma Malicky & Chantaramongkol 1993b , all reported from Thailand. In all these species, segment IX is anteroventrally produced in lateral view. Furthermore, C. sikkimensis is similar to C. rama in the form of the lateral lobes of tergum X in lateral view but differs distinctively in the shape of the inferior appendages (broad and quadrate apically in C. sikkimensis sp. nov. but narrow and pointed apically in C. rama ) and the mesal lobe of tergum X, which is pin-head-like at its apex in C. sikkimensis , but curved posteriorly in C. rama . The phallic apparatus of C. sikkimensis is with two sickle-shaped apical endothecal spines in ventral view and 4 asymmetrical spines in lateral view, whereas two asymmetrical endothecal spines are visible in C. rama .

Description: Length of each male forewing 5.25 mm (n=4), female forewing 7.50 mm (n=6). Color in alcohol, uniformly fulvous and covered with inconspicuous, sparse fulvous pubescence. Each antenna 3.25 mm long (n=10); maxillary palps each 1.13 mm long (n=10), segment 3 slightly longer than 2, 5 shorter than 3; labial palps 0.62 mm long (n=10). Forewing venation: Stem of Rs curved, slightly sclerotized and thickened at inflection; fork at base of discoidal cell not thickened, length of discoidal cell about 2 times width; crossvein m proximal to crossveins s and r-m; vein 2A not intersecting 3A ( Figs. 48, 49 ).

Male genitalia ( Figs. 14–16 , 38–39 ): Tergum IX very short, forming extremely narrow transverse band dorsally; anterolateral margins concave and anteroventral margins in lateral view distinctly produced anterad; posterior margin sinuous; posteroventral process weakly keel-like. Inferior appendages each obliquely directed upward, stout, narrow proximally and wider distally, with truncate apex slightly concave in lateral view and with apicodorsal and apicoventral corners spine-like and curved mesad. Tergum X with sclerotized and paired lateral and mesal lobes; in lateral view basal half of each lateral lobe broad and with conspicuous dorsal bulge, distal half tapering to blunt apex; each mesal lobe digitate and capitate, apically rounded like pin head in lateral view. Each preanal appendage knob-like in dorsal view. Sclerotized portion of phallic apparatus long, slender in lateral view ( Fig. 38 ), phallobase broad, cylindrical; posterior part of phallotheca cylindrical, somewhat expanded in ventral view ( Fig. 39 ); phallotremal sclerite complex not observed; endotheca with 5 microspines inside retracted phallotheca in ventral view, 2 long, slender, sickle-shaped spines present inside endotheca near apex of phallotheca and 2 asymmetrical, intermediate-size, anteroventrally directed spines visible inside endotheca near microspines in ventral view.

Material examined: Holotype 3, INDIA: Sikkim: Singhik, 27°31’N, 88°34’E, 1,900 m, 14-ix-2009, Pandher, deposited in PUPM. Paratypes: INDIA: Sikkim; Rongli, 900 m, 1-v-2009, Pandher & Parey, 23, 6Ƥ, deposited in PUPM; Uttrakhand; Barnighat, 78°83’N, 30°71’E, 1,200 m, 24-ix-2008, Pandher & Parey, 13, deposited in PUPM.

Distribution: India (Sikkim, Uttarakhand).

Etymology: The species is named after the Indian state of its holotype locality.

Figures

FIGURES 10 – 19. Chimarra spp. nov., male genitalia. 10 – 13, C. lakhwinderae sp. nov.: 10, left lateral view; 11, dorsal view; 12, dorsolateral view of right inferior appendage; 13, ventral view of right inferior appendage. 14 – 16, C. sikkimensis sp. nov.: 14, left lateral view; 15, dorsal view; 16, ventral view of right inferior appendage. 17 – 19, C. nakkiensis sp. nov. 17, left lateral view; 18, ventral view of right inferior appendage; 19, dorsal view.

FIGURES 36 – 41. Chimarra spp. nov., phallic apparatus. 36 – 37, C. soloi sp. nov.: 36, ventral view; 37, dorsal view. 38 – 39, C. sikkimensis sp. nov.: 38, left lateral view; 39, ventral view. 40 – 41, C. rifati sp. nov.: 40, left lateral view; 41, ventral view.

FIGURES 42 – 51. Venation of Chimarra spp. nov. 42 – 43, C. soloi sp. nov.: 42, forewing; 43, hind wing. 44 – 45, C. mawsmaiensis sp. nov.: 44, forewing; 45, hind wing. 46 – 47. C. lakhwinderae sp. nov.: 46, forewing; 47, hind wing. 48 – 49, C. sikkimensis sp. nov.: 48, forewing; 49, hind wing. 50 – 51, C. rongliensis sp. nov.: 50, forewing; 51, hind wing.