Tenuopus lomholdti 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 : 15-17

Tenuopus lomholdti Grichanov , sp. n.

Figs 5 , 12 , 20

TYPE MATERIAL. Holotype – ♂, Tanzania: East Uzambara , Amani, 1000 m,

26.I 1977, H. Enghoff, O. Lomholdt & O. Martin leg. [ ZMUC]. Paratype : 1♂ (in ethanol), Tanzania: Morogoro Reg., Udzungwa Mt. N. P., Mito Mitatu , 7°50'15.1''S ,

36°50'49.9''E, 1198 m, Malaise trap, 17.V 2013, T. Pape & N. Scharff leg. [ ZMUC] .

DESCRIPTION. Male. Head: frons black, whitish 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, 7 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-orange postpedicel; pedicel projected distally on inner side, with a crown of short black setae,

one of dorsal setae as long as pedicel; postpedicel rounded, slightly longer than high at base (1.5/1.3); arista-like stylus dorsal, with short hairs; length ratio of scape to pedicel to postpedicel to stylus (1 st and 2 nd segments), 15/17/20/12/92; palpus and proboscis short, yellow, covered with white hairs, proboscis also with a pair of black lateral setae.

Thorax: pleura dirty yellow; mesonotum brownish orange, with narrow black stripe along acrostichals, wider posteriorly and black on scutellum dorsally; 6

dorsocentral setae with posterior pair shifted laterally; acrostichals irregularly biseriate, short, 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 dark fine erect ventral hairs, at most half as long as diameter of femur, and 1-2 black posteroventral cilia; fore tibia simple, with 1 anterodorsal and 1 posterodorsal at base, 1-2 dorsals in middle, 1-2

apical setae; tarsomeres simple, with rather short ventral semi-erect setulae on all segments, with 1-2 elongate dorsal setae on distal apex of segments 1-4; claws simple; mid femur with very small anterior preapical seta, glabrous ventrally; mid tibia with 3 anterior, 3 posterodorsal, 3 ventral, 3-4 apical seta; basitarsus with few short ventral setae; hind femur without long hairs, with 1 strong anterior preapical seta; hind tibia with 3 anterior, 2 dorsal, 3 posterodorsal, 2-3 apical setae; basitarsus with few short posterior setae. Femur, tibia and tarsomere (from first to fifth) length ratio: fore leg: 44/45/35/19/19/21/12, mid leg: 31/50/35/15/11/6/4, hind leg:

28/51/17/15/10/6/3.

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, 16/2; 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, 9/31/23; 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; 2 nd –6 th yellow, with narrow brown or black posterior edging; 8 th segment and epandrium entirely yellow; 8 th segment with dark hairs; cerci and surstyli yellow; cercus covered with dark-yellow hairs and setae; surstylus dark at apex; hypandrium small, simple; phallus thin and simple; epandrial lobe prominent, finger-like, pointed at apex, with 4 ventral setae;

5 epandrial setae of different length between hypandrium and base of epandrial lobe, including 1 thick pedunculate seta; surstylus about as large as cercus,

irregularly leaf-like, with small dorsal process at apex, with 2 inner setae at middle;

cercus about half as long as epandrium, subtriangular, pointed at apex, covered with short hairs dorsally, double row of long setae distally.

MEASUREMENTS (in mm). Body length 5.8; antenna length 1.3; wing length

4.9; wing width 1.4.

Female. Unknown.

ETYMOLOGY. The species is named after the Danish entomologist, Dr. O.

Lomholdt (ZMUC), one of the collectors of the type specimens.

DIAGNOSIS. T. lomholdti sp. n. belongs to a group of species with biseriate acrostichals, being the closest to T. taitensis due to enlarged surstylus, differing from the latter in male cercus subtriangular, without process, surstylus about as large as cercus (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 19–22. Tenuopus spp., epandrial lobes and surstylus, right lateral view: 19 – T. kylei