Udzungwomyia simoni, Grichanov, 2019

Grichanov, Igor Ya., 2019, Discovery of Udzungwomyia Grichanov in South Africa and definition of a new tribe Udzungwomyiini (Diptera: Dolichopodidae), Israel Journal of Entomology (Oxford, England) 49 (2), pp. 267-275 : 270-274

Udzungwomyia simoni n. sp.

( Figs 1 − 8)

LSID: urn:lsid:zoobank.org:act:3B99522F-5983-46FA-B641-BBD3223E9670 .

Etymology: The species is named after the Israeli entomologist Dr Dany Simon, the collector of the type specimen.

Diagnosis: Body length about 2 mm; hind tibia with 2 thick black apicals; hind tarsus about as long as hind tibia; surstylus with dorsal arm narrow, with strong middorsal seta; ventral arm 2 times wider than dorsal arm, fused to epandrium, with strong midventral seta; 1 seta between arms of surstylus.

Description: Male ( Fig. 1). Head ( Fig. 2; shrunken): Vertex and frons black, grey pOLLinOse, with bLacK majOr bristLes; face bLacK, whitish pOLLinOse; verticaL bristLe black, strong and long, positioned on anterior slope of head; short postvertical seta as a linear continuation of postocular setal row; one pair of strong ocellar bristles with adjacent pair Of hairs; singLe rOw Of fine white simpLe pOstOcuLars decreasing in size upward; few upper postoculars black; eyes with short hairs between facets below, with microscopic hairs above; face under antenna and clypeus about 2× as wide as postpedicel height, narrowing at middle; face 10× as high as face width in middle; facial suture distinct; antenna ( Fig. 2) about as long as head height, black; scape and pedicel small, simple; pedicel with ring of apical setulae of approximately equal length; postpedicel slightly larger than pedicel, semiglobular, with indistinct apex, as long as high, white pubescent; stylus preapical, filiform, shortly haired, with its 1 st segment being very short; lengths of scape, pedicel, postpedicel, stylus (segments 1 and 2), 0.05/0.05/0.07/0.04/0.52; palpus brown, as long as clypeus, OvaL, Light haired, with bLacK apicaL seta; prObOscis thicK, prOjected, Light haired.

Thorax (shrunken): Matt, black, grey pollinose, with black setae; anterior slope of mesonotum shortly haired; 4 strong dorsocentrals; acrostichals absent; scutellars broken; 1 long and 1 short white propleural setae above fore coxa. Legs: Long and slender, mainly dirty yellow; setae and setulae black except as noted; fore coxa brown; mid and hind coxae black except orange apex; femora brown on basal half; fore and mid coxae with short simple anterior cilia; hind coxa with 1 strong lateral bristle at middle; claws on all legs small and black, pulvilli small and white; fore leg devoid of bristles, but fore tibia with 2–3 short apical setae; mid femur simple, with short fine anterior preapical seta; mid tibia with 1 short anterodorsal and 3–4 short apical setae; tarsomeres 1–4 with short apicals; hind femur simple, with anterior preapical seta, as long as diameter of femur; hind tibia slightly swollen at apex, with 2–3 short dorsals behind middle and 2 long curved black apicals of unequal length ( Fig. 3); hind basitarsus with basiventral process; tarsomeres 1–4 with short apicals ( Fig. 3); tibia and tarsomere (from first to fifth) length ratios: fore leg: 0.73:0.41:0.28:0.16:0.1:0.09, mid leg: 0.97:0.52:0.26:0.13:0.09:0.1, hind leg: 1.07:0.28:0.4:0.18:0.1:0.11. Wing: Hyaline, with brown veins; R 2+3 and R 4+5 gradually diverging to wing apex; R 4+5 and M 1 slightly converging on distal half, subparallel at wing apex. M 1 aLmOst straight, 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 to dm–m to distal part of M 4 (in mm), 0.2:0.14:0.2:0.27; crossvein dm–m almost straight, forming right angles with M 4 and with M 1 longitudinal veins, about as long as maximum distance between R 4+5 and M 1 veins; anal vein fold-like; narrow anal lobe present; alula absent; posterior wing margin between convex immediately before M 4; lower calypter yellow, with light setae; haltere brownish.

Abdomen (shrunken): Matt, black, laterally grey pollinose, with black hairs and setae along tergal margins; tergum 1 with longish light marginal setae; terga 1–6 and sterna 2–6 well-developed; tergum 5 forming ventral hood posteriorly; sternum 6 bare, covered with microtrichia; tergum 7 semicircular, very narrow, symmetrically lying along posterior margin of tergum 6, bare, ending laterally with minute plates (sternum 7) covered with microtrichia; segment 8 large, rounded, with short ventral process, covering basal side of epandrium, covered with microtrichia and sparse setae. Hypopygium ( Figs 4–8) including cerci entirely black, with light cilia; epandrium globular, basally asymmetrical, as long as high (lateral aspect), with symmetrical appendages; foramen large, positioned basally, but slightly shifted towards left side; hypandrium midventral, bifurcated from base, with two short pointed curved arms; parameraL sheath strOngLy prOjected and scLerOtised, bifurcated, with additiOnaL hOOK On bOth arms; phaLLus simpLe, shOrt and thin distaLLy; epandriaL LObe brOad, prOjected, fused with ventraL side Of epandrium, with strOng apicaL seta; surstyLus prOjected, bilobate, with subequal in length dorsal and ventral arms, covered with short apical setae; dorsal arm narrow, with strong middorsal seta; ventral arm 2× wider than dorsal arm, fused to epandrium, with strong midventral seta; 1 seta between arms of surstylus; cercus small, ovate, with blunt apex, covered with small hairs, bearing several simple setae dorsally and apically; cerci not fused.

Measurements (mm): Body length 2.1, antenna length 0.7, wing length 1.8, wing width 0.6.

Female. Unknown.

Holotype: ♂ South Africa: Limpopo: Louis Trichardt [23°03'S 29°54'E], 9.ii.1988, D. Simon (SMNHTAU).