Amblypsilopus udzungwensis, Grichanov, 2022

Grichanov, Igor Ya., 2022, Six new species of Amblypsilopus Bigot (Diptera: Dolichopodidae: Sciapodinae) and a key to species of the Afrotropical mainland, European Journal of Taxonomy 789 (1), pp. 49-80 : 74-75

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scientific name

Amblypsilopus udzungwensis

sp. nov.

Amblypsilopus udzungwensis sp. nov.

Fig. 7 View Fig


Amblypsilopus udzungwensis sp. nov. keys to A. nartshukae (see above), differing from the latter in the conoid postpedicel with apical arista-like stylus ( Fig. 7C View Fig ); the mid tibia with erect ciliation, the cercus with large middorsal tooth ( Fig. 7H View Fig ). The male of A. nartshukae is distinguished by the oval postpedicel with a dorsoapical arista-like stylus, the mid tibia without erect ciliation and the cercus with small distodorsal apophysis.


The species is named after the Udzungwa Mt National Park in the Morogoro Region of Tanzania, where the type was collected.

Material examined

Holotype TANZANIA • ♂ (dried from ethanol and mounted on pin); Morogoro Region, Udzungwa Mt National Park, Mito Mitatu ; 7°50ʹ22.7″ S, 36°50ʹ42.8″ E; 25 Nov. 2013; alt. 1235 m; T. Pape and N. Scharff leg.; Malaise trap #3; ZMUC. GoogleMaps


Male ( Fig. 7A View Fig )

MEASUREMENTS. Body length 4.3 mm; antenna length 1.3 mm; wing length 3.8 mm; wing width 1 mm.

HEAD ( Fig. 7B View Fig ). Frons greenish violet, shining; 1 black anterior vertical hair; 1 strong postvertical bristle; upper postocular setae black, short; lateral postocular setae white, uniserial; ventral postcranium covered with long irregular white hairs; face densely silvery-white pollinose, metallic under antennae, narrow, 2 times higher than clypeus, 1.8 times as high as wide under antennae, 5.5 times as high as wide at clypeus, at clypeus as wide as postpedicel; clypeus small, slightly bulging; antenna ( Fig. 7C View Fig ) nearly ⅓ as long as body, black; scape swollen, vase-like; pedicel rounded, with ring of short bristles, 1 long dorsal bristle; postpedicel conoid, 2 times as long as high, with short hairs; arista-like stylus black, apical, glabrous, bi-segmented; length (mm) of scape, pedicel, postpedicel, stylus (segments 1 and 2), 0.06/0.06/0.15/0.04/1.01; proboscis and palpus orange-brown, with yellow and black hairs.

THORAX. Mesonotum and scutellum shining green-violet; pleura black, white pollinose; 2 strong posterior dorsocentral bristles and 3 hair-like setae anteriorly (mostly broken); acrostichals strong, 3 pairs; scutellum with 2 strong bristles and 2 minute setae laterally.

LEGS. Mostly yellow; mid and hind coxae brown, fore leg brown from middle of tibia, mid and hind tarsi brownish to brown from middle of basitarsi; fore and mid coxae with white hairs and 2–3 brownish subapical setae; hind coxa with 1 brown bristle and 2–3 fine yellow setae at middle; fore femur with few long hairs at base; fore and mid tarsi ( Fig. 7D–E View Fig ) and mid tibia with rows of elongate semi-erect setulae, as long as podomere width; hind leg without remarkable setae or hairs; tarsomere 5 of all tarsi distinctly flattened and slightly widened; femur, tibia and tarsomere (from first to fifth) length ratio (mm): fore leg: 1.11/1.35/1.35/0.41/0.28/0.16/0.1, mid leg: 1.4/2.02/1.14/0.61/0.39/0.24/0.19, hind leg: 1.71/2.41/ 1.13/0.55/0.34/0.16/0.16.

WING ( Fig. 7F View Fig ). Almost hyaline, veins brown; R4+5 gently curved to M1 on apical third; M1+2 almost straight; M 1 with strong elbow, forming right angle with M 1+2; ratio of parts of costa between R 2+3 and R 4+5 to those between R 4+5 and M 1, 37/8; crossvein dm-m almost straight; ratio of crossvein dm-m to apical part of M 1+2 (fork-handle) to apical part of M 4, 40/73/14; anal lobe reduced; anal vein and angle absent; lower calypter yellow with white hairs; halter yellow.

ABDOMEN. Thin, 1.7 times as long as head and thorax combined, with black hairs and marginal setae; unmodified segments mostly shining green, black posteriorly along sutures, with black lateral spots; segments 6 and 7 black; segment 8 with short hairs; hypopygium and its appendages ( Fig. 7G View Fig ) brownblack; cercus as long as epandrium, broad on basal third, narrow on distal third, with black setae dorsally, with narrow dorsal process at basal third and small dorsal tubercle at distal third ( Fig. 4H View Fig ); surstylus projected, broad, subtriangular, with small distodorsal process, with few long dorsal and distal setae; 1 long pedunculate and 2 short epandrial setae.




Zoological Museum, University of Copenhagen