Tenuopus shcherbakovi Grichanov, 1996

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 : 17-19

Tenuopus shcherbakovi Grichanov, 1996

Figs 7, 13 , 21

MATERIAL EXAMINED. 1♂ (dried from ethanol and mounted on pin), Kenya :

Kakamega Forest , 0°22'S, 34°50'E, 1500 m, 3.VI 2000, white pantrap, M. Kraemer

& G. Velten [ NMSA]; 1♀, Tanzania: East Uzambara , Amani, 1000 m, 1.II 1977 ,

H. Enghoff, O. Lomholdt, O. Martin [ ZMUC].

DESCRIPTION. Male (somewhat discolorated). Head: frons black, pollinose;

one pair of well developed postvertical setae; upper postocular setae black, slightly 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, with yellow scape and pedicel and orange postpedicel; pedicel projected distally on inner side, with a crown of short black setae, one of dorsal setae as long as pedicel; postpedicel subtriangular, as long as high (1/1); arista-like stylus dorsal,

with short hairs; length ratio of scape to pedicel to postpedicel to stylus (1 st and 2 nd

segments), 4/5/5/2/34; palpus and proboscis short, yellow, covered with white hairs,

proboscis also with a pair of black lateral setae.

Thorax: pleura yellow; mesonotum orange, dark medially on posterior part;

scutellum dorsally mostly metallic blue-green; 6 dorsocentral setae with posterior pair shifted laterally; acrostichals uniseriate, strong, nearly reaching 5 th dorsocentrals;

scutellum with 2 strong bristles and 2 short lateral hairs; proepisternum with 1 long and 1 short brown 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 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 and posterior setulae, 1 anterodorsal and 1 posterodorsal at base, 1-2 dorsals in middle,

1-2 apical setae; basitarsus with elongate setulae ventrally, slightly thickened at apex;

apical half of 2 nd, 3 rd to 5 th segments with posteroventral row of strong erect setulae;

2 nd to 4 th segments with 1-2 short dorsoapical setae; claws simple; mid femur with strong anterior preapical seta, with semi-erect black ventral hairs in distal half, 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: 11/12/8/6/2/3/3, mid leg: 10/15/9/4/3/2/1, hind leg: 12/20/5/6/3/2/1.

Wing greyish, 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, 5/1; 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, 3/8/8; anal vein foldlike, not reaching wing margin; anal angle obtuse; lower calypter yellow, with brown apex and pale setae; halter yellow with white knob,

halter stem thin and long, with dorsal and ventral groups of short hairs distally.

sp. n.; 20 – T. lomholdti sp. n.; 21 – T. shcherbakovi Grichanov ; 22 – T. unicolor (Becker) .

Abdomen mostly yellow, black setose; 1 st segment yellow; 2 nd –5 th yellow, with narrow black edgings posteriorly; 6 th, 8 th segments and epandrium almost entirely black; epandrial lobes brown; hypandrium small, simple; phallus thin and simple; 1

short epandrial lobe bearing 2 long apical setae at base of hypandrium; 1 long epandrial lobe distally with 2 arms, with proximal arm bearing minute apical seta and distal arm bearing long apical seta; 1 thin distoventral lobe, as long as bifurcated lobe, bearing 2 short and 1 long setae at apex; 1 very long sword-shaped distoventral lobe, as long as epandrium, bearing 3 short setae, i.e. 1 apical, 1 subapical and 1

seta at middle of inner side; surstylus black, long and narrow, nearly half as long as epandrium, bearing 3 minute setae in distal half and strong dorsal tooth at middle;

cercus yellow, twice longer than epandrium, elongate-ovate, broadened in basal half, covered with rather short, mostly black hairs, shorter and denser at apex.

MEASUREMENTS (in mm; in ethanol). Body length 7.0; antenna length 1.2;

wing length 5.4; wing width 1.5.

DISTRIBUTION. Type locality: Uganda: Namanve. Kenya, Uganda. This species is recorded here from Tanzania for the first time .

DIAGNOSIS. The species was originally described by a female ( Grichanov,

1996). Later, its males and females were recorded by Grichanov et al. (2011a). One of those males is here described for the first time. T. shcherbakovi belongs to a group of species with uniseriate acrostichals, being the closest to T. unicolor ,

differing from the latter in male and female postpedicel subtriangular, as long as high; cercus broadest at base (see key above).

Figures

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

Figs 19–22. Tenuopus spp., epandrial lobes and surstylus, right lateral view: 19 – T. kylei