Tenuopus kirkspriggsi Grichanov, 2018

Grichanov, I. Ya., 2018, A new subfamily of Dolichopodidae (Diptera) for Tenuopus Curran, 1924 with description of new species from Tropical Africa, Far Eastern Entomologist 365, pp. 1-25 : 12-13

Tenuopus kirkspriggsi Grichanov , sp. n.

Figs 3 , 10 , 18

TYPE MATERIAL. Holotype – ♂, Burundi: Kayanza Prov., Parc National de la Kibira, Rwegura Sector, 2°55.320'S, 29°30.067'E, 2237 m, 21–26.XI 2010, A.H.

Kirk-Spriggs / malaise trap, indigenous Afromontane forest [ BMSA].

DESCRIPTION. Male. Head: frons metallic blue-black, weakly pollinose; one pair of short postvertical setae, as long as 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, 6 times as high as wide in middle, nearly as wide as postpedicel; clypeus slightly bulging; antennae as long as height of head, with yellow scape and pedicel and yellow-brown postpedicel; pedicel projected distally on inner side, with a crown of short black setae,

one of dorsal setae as long as pedicel; postpedicel rounded-oval, slightly longer than high at base (1.6/1.3); arista-like stylus dorsal, with short hairs; length ratio of scape to pedicel to postpedicel to stylus (1 st and 2 nd segments), 4/5/8/3/34; palpus and proboscis short, yellow, covered with white hairs, proboscis also with a pair of black lateral setae.

Thorax: pleura yellow; mesonotum orange, with almost all the surface between dorsocentrals blue-green; scutellum dorsally mostly metallic blue-green; 6 dorsocentral setae with posterior pair shifted laterally; acrostichals biseriate, strong, nearly reaching 5 th dorsocentrals; scutellum with 2 strong bristles and 2 short lateral hairs;

proepisternum with 2 yellow setae.

Legs yellow, slightly darkened distally; tarsi brown from tip of basitarsus; 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 numerous dark and light fine erect ventral hairs, at most half as long as diameter of femur, and 3 long black posteroventral cilia; fore tibia simple, with elongate ventral hairs and posterior setulae, 1 anterodorsal and 1 posterodorsal at base, 1-2 apical setae; tarsomeres covered with dense hairs ventrally, elongate setulae dorsally; claws simple; mid femur with strong anterior preapical seta, with erect black ventral hairs,

at most half as long as diameter of femur; mid tibia with 3 anterior, 3 posterodorsal,

3-5 ventral, 4-5 apical setae; mid basitarsus with several short ventral setae; hind femur without long hairs, with 1 strong anterior preapical seta; hind tibia with 3-4

anterior, 2 anterodorsal, 2 posterodorsal, 3-4 apical setae. Femur, tibia and tarsomere

(from first to fifth) length ratio: fore leg: 38/46/38/25/19/11/5, mid leg: 43/72/36/

16/14/7/4, hind leg: 46/71/18/21/11/7/4.

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, 14/3; M 1 with gentle arc to apex, reaching costa right before wing apex; M 2 present as fold on membrane;

crossvein dm-m straight; ratio of crossvein dm-m to apical part of M 1+2 (fork-handle) to apical part of M 4, 7/23/19; anal vein foldlike, not reaching wing margin; anal angle obtuse; lower calypter yellow, with black apex and pale setae; halter yellow,

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 triangular black posterior spot dorsally; 2 nd –6 th yellow, with broad black edging posteriorly and with small brown dorsal spot anteriorly; 8 th segment and epandrium entirely black; cercus and epandrial lobes orange-brown; surstylus black; cercus covered with dark-yellow hairs and setae; hypandrium small, simple; phallus thin and simple;

ventral epandrial lobes reduced to short lobules or pedunculate setae; distoventral epandrial lobe prominent, narrow, with 3 minute setae in distal half; surstylus about half as long as cercus, simple, strongly sclerotised, curved; cercus about half as long as epandrium, subtriangular, covered with yellow-brown hairs and setae.

MEASUREMENTS (in mm). Body length 6.3; antenna length 1.3; wing length

6.3; wing width 1.9.

Female. Unknown.

ETYMOLOGY. The species is named after the South African entomologist, Dr.

A.H. Kirk-Spriggs ( BMSA), the collector of the type specimen .

DISTRIBUTION. Burundi.

DIAGNOSIS. T. kirkspriggsi sp. n. belongs to a group of species with biseriate acrostichals, being the closest to T. gorongosaensis sp. n., differing from the latter in male cercus as long as epandrium, swollen at base, narrow at apex (see key above).

Figures

Figs 1–6. Tenuopus spp., head: 1 – T. bururiensis sp. n.; 2 – T. gorongosaensis sp. n.; 3 – T. kirkspriggsi sp. n.; 4 – T. kylei sp. n.; 5 – T. lomholdti sp. n.; 6 – T. unicolor (Becker).

Figs 7–14. Tenuopus spp. 7 – T. shcherbakovi Grichanov, head in ethanol with everted

Figs 15–18. Tenuopus spp., epandrial lobes and surstylus, right (15, 18) and left (16) lateral