Amblypsilopus bairae, Grichanov, 2021

Grichanov, Igor Ya., 2021, Eleven new species of Amblypsilopus Bigot (Diptera: Dolichopodidae: Sciapodinae) and a key to the species of Madagascar and adjacent islands, European Journal of Taxonomy 755 (1), pp. 47-87 : 55-57

Amblypsilopus bairae sp. nov.

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Fig. 2

Diagnosis

Amblypsilopus bairae sp. nov. is close to A. flavus and A. friedmani sp. nov. in habitus. The last two species differ from A. bairae sp. nov. in the fore basitarsus at least two times as long as tibia and in a bifurcated cercus. Fore basitarsus 1.5 times as long as tibia in the new species; fore tibia and tarsus entirely covered with erect setulae, about as long as diameter of podomeres, somewhat longer at base of tibia and at base of basitarsus; cercus with broad and high basal part and long filiform distal part ( Fig. 2F–G ).

Etymology

The species name is dedicated to Baira Grichanova, mother of my grandchildren (St. Petersburg, Russia).

Material examined

Holotype MADAGASCAR • ♂; Andasibe, Analamazaotra Forest ; 18°46′ S, 48°24ʹ E; 950 m a.s.l.; 31 Oct.–4 Nov. 2007; A. Freidberg leg.; SMNHTAU.

Description

Male ( Fig. 2A )

MEASUREMENTS. Body length 5.7 mm; antenna length 3.3 mm; wing length 5.4 mm; wing width 1.7 mm.

HEAD ( Fig. 2B ). Frons greenish blue-black, whitish pollinose; anterior vertical seta absent; long and strong postvertical bristle; upper postocular setae black, short; lateral postocular setae white, uniserial; ventral postcranium covered with irregular white long hairs; face blue-black, white pollinose, broad, 1.2 times as high as wide under antennae, 2.2 times as high as than wide at clypeus, at clypeus 2.5 times as wide as postpedicel; clypeus large, slightly bulging, as high as wide; antenna ( Fig. 2C ) with scape and pedicel dirty yellow, postpedicel brown-black, 3.6 times as long as height of head; scape swollen; pedicel with short bristles, with one long dorsal and two long ventral bristles; postpedicel elongate-conoid, 1.25 times as long as high, with short hairs; arista-like stylus black, apical, separated from postpedicel, with fused segments, microscopically haired; length (mm) of scape, pedicel, postpedicel, stylus, 0.09/0.08/0.15/3.03; proboscis and palpus orange, with white and black hairs; palpus with 1 black bristle.

THORAX. Mesonotum orange-brown, shining, weakly pollinose; scutellum black dorsally, metallic bluish green; pleura dark brown, white pollinose; metepimeron yellow; 2 long dorsocentral bristles with strongest posterior pair, and 3 hairlike setae anteriorly; acrostichals long, biserial, gradually decreasing in size anteriorly, with posterior setae as long as penultimate dorsocentrals; scutellum with 2 strong bristles and 2 hairs laterally.

LEGS. Mostly yellow or dirty yellow; coxae yellow, but mid and hind coxae brownish from outside; fore tarsus brown from tip of basitarsus; mid and hind tarsi black from tip of basitarsus; fore and mid coxae with long white and black hairs and 2–4 black subapical bristles; hind coxa with 1 black seta at middle; fore femur with anterior row of long setae on basal half, about as long as diameter of femur, and 2–3 posterior long setae at base; mid femur with posteroventral subapical seta; fore tibia ( Fig. 2D ) and tarsus entirely covered with erect setulae, about as long as diameter of podomeres, somewhat longer at base of tibia and at base of basitarsus; mid tibia with 2 anterodorsals and 2 posterodorsals, with 1 ventral seta; mid and hind tarsi simple, cylindrical; hind tibia with several dorsal and short ventral setae; femur, tibia and tarsomere (from first to fifth) length ratio (mm): fore leg: 1.78/1.88/2.51/0.78/0.7/0.46/0.21, mid leg: 1.74/2.5/2.06/0.74/0.51/0.3/0.14, hind leg: 2.13/3.34/1.49/0.85/0.43/0.14/0.1.

WING ( Fig. 2E ). Weakly widened distally, almost hyaline, veins brown; R 4+5 gently curved to M 1 in apical third; M 1+2 straight; M 1 with strong elbow, forming nearly right angle with M 1+2 and obtuse angle with M 2; ratio of parts of costa between R and R 4+5 to those between R 4+5 and M 1, 3.35/1; crossvein dm-m straight; ratio of crossvein dm-m to apical part of M 1+2 (fork-handle) to apical part of M 4, 0.66/1.08/0.35; anal vein and lobe weakly developed; anal angle obtuse; lower calypter yellow, with black cilia; halter yellow with brown knob.

2+3

ABDOMEN. Thin, mostly shining blue-green, with short black hairs and long marginal setae; segment 1 yellow, with white and dark hairs; segments 2–3 mostly orange-yellow, blackish distally; segments 4–6 black; pregenital segments combined 2.3 times as long as mesonotum; hypopygium ( Fig. 2F ) orange-brown, with brown appendages; cercus with short narrow neck bearing 2 very long and 2 short pedunculate setae, with broad and high basal part bearing short setae along distal and ventral margins, with long filiform distal part covered with brown-black setae along whole length and curved hairs ventrally; surstylus ( Fig. 2G ) projected, bilobed; dorsal arm of surstylus deeply cleft, with 3 apical and subapical setae on each lobe; ventral arm of surstylus small, finger-like, with 3 small setae apically; epandrial lobe small, triangular, with 1 basal, 1 median and 1 apical seta.

Female

Unknown.

Figures

Fig. 2. Amblypsilopus bairae sp. nov. Holotype, ♂ (SMNHTAU). A. Habitus. B. Head. C. Antenna. D. Fore tibia. E. Wing. F. Hypopygium, left lateral view, reflected light. G. Epandrial lobe, surstylus and base of cercus, lateral view, transmitted light.