New Afrotropical species of Tenuopus Curran, 1924 (Diptera: Dolichopodidae) Author Grichanov, I. Ya. text Russian Entomological Journal 2019 2019-12-31 28 4 460 463 http://dx.doi.org/10.15298/rusentj.28.4.15 journal article 10.15298/rusentj.28.4.15 0132-8069 13163742 Tenuopus comorensis Grichanov , sp.n. Figs 1–2 . MATERIAL. Holotype ♂ (dried from ethanol and mounted on pin), [ Comoros :] Comoren , Grand Comore , bergauf von Bahani , 12.IV.2002 , M. Kotrba ( ZSM ). DESCRIPTION. Male (somewhat discolorated). Head . Frons black, grey pollinose; one pair of short postvertical setae, shorter than uppermost postocular seta; upper postocular setae black, increasing in length upward; lateral and lower postoculars white; ventral postcranium covered with irregular white hairs; face silvery-white, 7 times as high as wide in middle, nearly as wide as postpedicel; clypeus bulging; antennae as long as height of head, yellow; pedicel projected distally on inner side, with a crown of short black setae, one of dorsal setae nearly as long as pedicel; postpedicel rounded, as long as high at base (20/17); arista-like stylus dorsal, with short hairs; length ratio of scape to pedicel to postpedicel to stylus (1 st and 2 nd segments), 11/15/20/10/73; palpus and proboscis short, yellow, covered with white hairs, proboscis also with a pair of black lateral setae. Thorax . Pleura dirty yellow; mesonotum orange, with narrow brown stripe along acrostichals, wider posteriorly and brown on scutellum dorsally; 6 dorsocentral setae with posterior pair shifted laterally; acrostichals regularly biseriate, strong, nearly reaching 5 th dorsocentrals; scutellum with 2 strong bristles and 2 short lateral hairs; proepisternum with 2 yellow setae. Legs. Yellow; last segments of tarsi brown; fore and mid coxae with black hairs anteriorly and 5-7 black apical bristles of various length; hind coxa with one long black outer bristle above middle; fore femur with only dark fine erect ventral hairs on basal half, and 3 short black posteroventral cilia; fore tibia simple, with 1 anterodorsal and 1 posterodorsal at base, 2 apical setae; 2 nd segment of fore tarsus on distal third and 3 rd segment on basal half with posteroventral row of short semi-erect setulae; claws simple; mid femur without anterior preapical seta, with anteroventral row of black erect hairs, about half as long as diameter of femur; mid tibia with 3 anterior, 3 posterodorsal, 3–4 short ventral, 4–5 apical setae; mid basitarsus with several short ventral setae; hind femur ventrally with black erect hairs, about one-third as long as diameter of femur, with 1 strong anterior preapical seta; hind tibia with 4 anterior, 4 posterodorsal, 3–4 apical setae. Femur, tibia and tarsomere (from first to fifth) length ratio (in mm): fore leg: 1.85/1.98/1.69/1.13/0.86/0.59/0.31, mid leg: 1.86/2.79/2.07/ 0.96/0.76/0.45/0.19, hind leg: 2.45/3.81/1.26/1.25/0.80/0.49/ 0.24. Wing. Greyish, almost hyaline, veins brown; subcosta very thin; ratio of part of costa between R 2+3 and R 4+5 to that between R 4+5 and M 1 , 6/1; M 1 with gentle arc to apex, reaching costa right before wing apex; M 2 present as fold on membrane; cross-vein dm-m straight; ratio of crossvein dm-m to apical part of M 1+2 (fork-handle) to apical part of M 4 , 0.37/ 1.12/0.85; anal vein foldlike, not reaching wing margin; anal angle obtuse; lower calypter yellow, with black apex and pale setae; halter yellow with orange knob, halter stem thin and long, with dorsal and ventral groups of short hairs distally. Abdomen. Mostly yellow-orange, black setose; 1 st segment yellow, with narrow brown posterior edging; 2 nd –5 th yellow, with narrow brown edging posteriorly and anteriorly; 6 th mostly brown; 8 th segment and epandrium entirely yellow; 8 th segment with brownish setae; cercus and surstylus yellow; cercus covered with yellow hairs and setae; hypandrium small, simple; phallus thin and simple; 2 long epandrial lobes distally on each side; thin epandrial lobe with 1 basal and 1 apical long setae, with 3 short setae; thick epandrial lobe expanded distally, with 5 setae at apex; surstylus slightly shorter than cercus, divided in 2 subequal lobes from middle, with 2 setae at apex of each lobe; cercus half as long as epandrium, elongate, with narrow distal process, covered with long setae dorsally and ventrally. Figs 1–4. Tenuopus spp. , males: 1–2 — T. comorensis Grichanov , sp.n. ; 3–4 — T. birketti Grichanov , sp.n. ; 1, 3 — head; 2, 4 — hypopygium, lateral view. Рис. 1–4. Tenuopus spp. , самцы: 1–2 — T. comorensis Grichanov , sp.n. ; 3–4 — T. birketti Grichanov , sp.n. ; 1, 3 — голова; 2, 4 — гипопигий, сбоку. Measurements (in mm, in ethanol). Body length 7.0, antenna length 1.2, wing length 5.7, wing width 1.6. Female . Unknown. ETYMOLOGY. The species is named after the Comoro Islands . DISTRIBUTION. Comoros . DIAGNOSIS. T. comorensis sp.n. belongs to a group of species with biseriate acrostichals, being the closest to T. gorongosaensis Grichanov, 2018 and T. kirkspriggsi Grichanov, 2018 , differing in ciliation of fore leg and morphology of hypopygial appendages (see key below). 16. Cercus spatulate, slightly expanded distally;surstylus about as long as cercus, divided in 2 lobes from base; 3 rd to 5 th segments of fore tarsus with posteroventral row of short semi-erect setulae ............ T. gorongosaensis Grichanov — Cercus swollen at base, narrow at apex; other features various ...................................................................... 16a 16a. Fore tibia with elongate ventral hairs and posterior setulae; fore tarsomeres covered with dense hairs ventrally and elongate setulae dorsally; surstylus about half as long as cercus, simple .......... T. kirkspriggsi Grichanov — Fore tibia without elongate hairs and setulae; 2 nd segment of fore tarsus on distal third and 3 rd segment on basal half with posteroventral row of short semi-erect setulae; surstylus about as long as cercus, divided in 2 lobes from middle ............................................. T. comorensis sp.n.