Coenosia ukokensis, Sorokina, Vera S., 2009

Sorokina, Vera S., 2009, A key to Siberian flies of the genus Coenosia Meigen (Diptera, Muscidae) with the descriptions of three new species, Zootaxa 2308, pp. 1-28 : 20-21

Coenosia ukokensis sp. nov.

Figs. 13 A–E

Diagnosis: The species is very similar to Coenosia nigrotincta Hennig. The new species can be recognised as follows: scutum with 2 brownish very diffuse longitudinal vittae, lower calypter scarcely longer than upper one, anterior presutural dc well developed, strong and 1/2–2/3 times as long as posterior seta, tergites 2–4 with triangular spots (indistinct in female), mid femur with 5–6 strong av in basal half, and different terminalia.

Etymology: The species name is based on the type-locality, the Ukok plateau.

Type material examined: Holotype 3, Respublika Altay, Ukok plateau, environs of Muzdy-Bulak lake, 2600–2900m, 49º17'N 87º39'Е, 1.07.2005, V. Sorokina ( SZNM). Paratypes 4 3 3 Ƥ, Respublika Altay, Ukok plateau, environs of Muzdy-Bulak lake, 2600m, 49º17'N 87º39'Е, 26.06.2005, A. Barkalov ( SZNM); 1 3, Respublika Altay, Ukok plateau, 6km NE Maitobe mountain, 2600–2800m, 49°34'N 87°43'E, 8.07.2006, V. Sorokina ( SZNM).

Description: Male: body 5.5–5.7mm, wing 5.0– 5.5mm.

Head: Ground-colour black. Fronto-orbital plate, parafacial and gena densely whitish-grey pruinose. Eyes widely separated by a black frontal vitta. Frontal triangle grey dusted, not reaching middle of frons. Ocellar triangle slightly shining around ocellus. Frons with 4 pairs of strong frontal setae, and with a short thin seta between these setae. Mouthedge not projecting beyond level of profrons ( Fig. 13 E). Width of parafacial about 2/3 of width of postpedicel. Height of gena about 2 times width of postpedicel. Antenna black, postpedicel ca. 2.5 times as long as wide. Arista black, short-pubescent, with longest individual hairs a little shorter than basal diameter of arista. Palpus black. Proboscis long, shining, with strong apical teeth.

Thorax: Black, densely grey dusted. Prosternum bare. Ground-setulae of postpronotal lobe setulose, not spinulose. Scutum with 2 brownish very diffuse longitudinal vittae and with an indistinct brownish vitta between ph and ps seta on each side. Presutural acr in 2 uneven rows; 2 + 3 dc, anterior presutural dc well developed, strong and about 1/2–2/3 as long as posterior seta. Two proepisternal setae. Apical and basal scutellars well developed and equal in length.

Legs: All femora black, trochanters brown; tibiae yellowish-brown, apical 1/2 or 2/3 darkened and sometimes visibly black, basal 1/2 or 1/3 yellow; all tarsomeres black. Pulvilli elongate. Fore tibia with 1 strong long p. Mid femur with a complete row of pv, 5–6 av in basal half, with 1 strong a and 2 strong p preapical setae. Mid tibia with 1 ad, and 1 pd at middle. Hind femur with complete rows of long and strong av and pv. Hind tibia with 1 av, 1 long ad and 1 pd (sometimes 2 pd but one of them short and weak), av and ad not close together, preapical d and pd different in length and not close together.

Wing: Light coloured, with a slight brownish tinge. Calypters yellow; lower calypter a little longer than upper one. Haltere yellow.

Abdomen: Black with thick blue-grey dust, elongate, oval. Tergites 2–4 each with a pair of brown triangular spots, tergite 5 with more or less rounded spots. Sternite 1 bare; sternite 5 large, shining at apex.

Terminalia: as in Figs. 13 A, 13B.

Female: body 6.0– 6.5mm, wing 5.5–6.0mm.

Similar to male but differing from it as follows: Frons with 3–4 pairs of strong frontal setae, frontal triangle reaching middle of frons. Abdominal paired rounded spots indistinct, tergites with dark bristle-dots. Mid and hind femora with av and pv shorter and weaker than in male.

Ovipositor: as in Figs. 13C, 13 D.

Distribution: Russia, Respublika Altay.

Figures

FIGURE 13. C. ukokensis (paratype). A. Male terminalia, lateral view. B. Male cercal plates, posterior view. C. Female ovipositor, lateral view. D. Female, apical portion of ovipositor, dorsal view. E. Male head, lateral view.