Udzungwomyia lundeans, Grichanov, 2024

Grichanov, I. Ya., 2024, Four new species of the genus Udzungwomyia Grichanov, 2018 from Lesotho and South Africa (Diptera: Dolichopodidae), Russian Entomological Journal 33 (1), pp. 116-123 : 123

Udzungwomyia lundeans sp.n.

Figs 23 − 29 .

MATERIAL. Holotype ♂, Republic of South Africa, Lundean’s [=Lundin’s] Nek, Barkly East District , Eastern Cape Province, 1925–2100 m, 18.I.1963, B. & P. Stuckenberg ( NMSA; male terminalia dissected and stored in glycerin in microvial pinned with the specimen).

DESCRIPTION. Male ( Fig. 23 ). Length (mm): body 2.7, wing 2.7/1.0, antenna 0.9. Head ( Fig. 24 ). Vertex and frons black, whitish grey pollinose, with black major setae; face black, white pollinose; face in middle narrowing, as wide as postpedicel height; facial suture distinct; antenna ( Fig. 25 ) about as long as head height, black; postpedicel slightly larger than pedicel, globular, with indistinct apex, as long as high, white pubescent; arista-like stylus preapical, filiform, shortly haired; length ratio of scape to pedicel to postpedicel to stylus, 0.04/0.05/0.09/0.77; proboscis small, light haired; palpus enlarged, silvery white pollinose, with white setae; lower postocular setae white; about 5 upper postoculars short, black. Thorax mat, black, with black setae; mesonotum grey pollinose; pleura whitish grey pollinose; posterior third of mesonotum distinctly flattened; anterior third of mesonotum haired; propleuron with 1 white propleural seta and few short hairs; 4 pairs of strong dorsocentral setae; acrostichals absent; 1 pair of scutellars. Legs long and slen- der, bicolorate; setae and setulae black except as noted; coxae black except orange apex, whitish pollinose; fore and mid coxae with short simple white anterior cilia; hind coxa with 1 strong white lateral seta at middle; trochanters brown; femora black except yellow distal apices; tibiae dirty yellow; tarsi with 2–3 basal segments dirty yellow and 2–3 distal segments black; claws on all legs small and black, pulvilli white; fore leg devoid of strong setae, but fore tibia with 2 very short anterodorsals and 2–3 short apical setae; mid femur simple, with anterior preapical seta; mid tibia with 1 anterodorsal and 4 apical setae; tarsomeres 1–3 with short apicals; hind femur simple, with anterior preapical seta, as long as diameter of femur; hind tibia slightly swollen at apex, with 1 anterodorsal seta, 3–4 short dorsals behind middle; hind basitarsus ( Fig. 26 ) with basoventral tooth; tibia and tarsomere (from first to fifth) length (mm): fore leg: 0.85/0.34/0.27/0.19/0.11/0.12, mid leg: 1.25/0.57/0.35/0.19/0.1/0.11, hind leg: 1.39/0.33/0.46/0.3/ 0.13/0.13. Wing ( Fig. 27 ) almost hyaline, with brown veins; costa slightly thickened behind R 1; R 2+3 and R 4+5 subparallel, diverging at wing apex; R 4+5 and M 1+2 slightly converging on distal half; M 1+2 almost straight beyond dm-m, joining costa beyond wing apex; ratio of part of costa between R 2+3 and R 4+5 to this between R 4+5 and M 1+2 to dm-m to distal part of M 4 (in mm), 0.29/0.19/0.22/0.24; crossvein dm-m weakly convex, 3/5 as long as maximum distance between R 4+5 and M 1+2 veins; anal vein distinct; narrow anal lobe present; alula absent; posterior wing margin between base and M 4 almost straight, forming distinct bulge immediately before M 4; lower calypter light brownish, with white setae; halter yellow. Abdomen mat, black, laterally whitish pollinose, with black hairs and setae along tergal margins; hypopygium including cerci entirely black, with light cilia; terga 2–4 laterally whitish pollinose; sterna 2–4 well developed; sternum 4 large, with broad distomedial hairy projection ( Fig. 28 ); sterna 5–6 reduced, membranous; tergum 6 large, glabrous; tergum 7 semicircular, very narrow; segment 8 large, rounded, covered with short white setae; hypopygium ( Fig. 28 ) partly concealed, black; cercus black; epandrium globular, basally asymmetrical, as long as high (lateral aspect), with symmetrical appendages; foramen positioned left basolaterally; hypandrium midventral, trilobate, with short medial lobe and 2 spine-like lateral lobes directed ventrally; phallus simple, short and thick; epandrial lobe broad at base, beak-like at apex, bearing 1 preapical seta; ventral lobe of surstylus short and broad ( Fig. 29 ), with medial finger-like projection, with short setae; dorsal lobe of surstylus long and narrow ( Fig. 29 ), thickened and rounded apically, with short setae; cercus small, subtriangular (dorsal aspect), with indistinct apex, covered with short white hairs, bearing several moderately long straight setae; cerci separated, not fused.

Female. Unknown.

ETYMOLOGY. The species is named after the Lundean’s Nek, a pass across the Witteberge range, an outlier of the Drakensberg escarpment, where the type material was collected.

DISTRIBUTION. South Africa (Eastern Cape).

DIAGNOSIS. The new species is similar in habitus to U. maseru sp.n., strongly differing in silvery white palpus, distinctly separated eyes, distinct bulge immediately before wing vein M 4 and shape of male hind basitarsus. U. maseru sp.n. male have black palpus, almost contiguous eyes in middle of face, straight posterior wing margin and shape of male hind basitarsus.

Figures

Figs 23–29. Udzungwomyia lundeans, sp.n., male: 23 — habitus; 23 — head; 24 — antenna; 26 — hind tarsus, anterior view; 27 — wing; 28 — abdominal segments 4–6 and hypopygium, right lateral view; 29 — details of hypopygial appendages, lateral view. Рис. 23–29. Udzungwomyia lundeans, sp.n., самец: 23 — внешний вид; 24 — голова; 25 — усик; 26 — ЗаднЯЯ лапка, вид спереди; 27 — крыло; 28 — брюшные сегменты 4–6 и гипопигий, вид справа сбоку; 29 — детали придатков гипопигиЯ, вид сбоку.