Coenosia altaica, 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 : 15-17

Coenosia altaica sp. nov.

Figs. 11 A–F

Diagnosis: The species is very similar to Coenosia gracilis Stein. The new species can be recognised as follows: frons with 3 pairs of frontal seta, male abdomen with brownish marks, mid femur with 2–3 pv and 1– 2 av in basal half, mid tibia with 1 strong ad, hind femur with 2 pv in basal half, hind tibia with short pd or, in female, sometimes without pd, different terminalia.

Etymology. The species name is based on the type-locality, Respublika Altay.

Type material examined: Holotype 3, Respublika Altay, Ukok plateau, Akkol river, 2160m, 49°25'N 87°37'E, 12.07.2006, V. Sorokina ( SZNM). Paratypes 1 3 9 Ƥ, same data as holotype ( SZNM, ZMUM); 2 Ƥ, Respublika Altay, Ukok plateau, environs of Muzdy-Bulak lake, 2400m, 49º17'N 87º39'Е, 27, 28.06.2005, V. Sorokina ( SZNM, ZMUM); 1 3, Respublika Altay, Ukok plateau, Zerlukol’-Nur lake, 2300m, 49º34'N 88º13'Е, 23.06.2005, V. Sorokina ( SZNM); 1 3 1 Ƥ, Respublika Altay, Ukok plateau, 6–8km NE Maitobe mountain, 2400–2700m, 49°34'N 87°43'E, 8.07.2006, T. Novgorodova, V. Sorokina ( SZNM); 1 3 1 Ƥ, Respublika Altay, Ukok plateau, environs of Kal’dzhin-Kul’-Bas lake, 2400m, 49°19'N 87°26'E, 17, 21.07.2006, T. Novgorodova, V. Sorokina ( SZNM); 1 3 1 Ƥ, 19km SE Dzhazator, 2115m, 49°37'N 87°39'E, 5.07.2006, V. Sorokina ( SZNM); 1 3, Respublika Altay, Shapshal’skiy mountain range, 2878m, 50º32'N 89º48'E, 24.07.2007, V. Sorokina ( SZNM).

Description: Male: body 3.5–3.7mm, wing 3.4–3.5mm.

Head: Ground-colour black with dense whitish-grey pruinosity. Mouthedge not projecting beyond level of profrons or only insignificantly projecting ( Fig. 11 F). Eyes widely separated by a black frontal vitta. Frontal vitta 3 times as wide as a fronto-orbital plate. Frontal triangle becoming very narrow at middle and reaching front margin of frons. Frons with 3 pairs of frontal setae, middle seta a little shorter than the other two setae. Width of parafacial at level of base of antenna about as wide as postpedicel and becoming a little narrower at middle. Height of gena 1.5 times width of postpedicel. Antenna black, postpedicel ca. 2.5 times as long as wide. Arista black, short-pubescent, with longest individual hairs shorter than basal diameter of arista. Palpus brownish or black. Proboscis long, shining, with strong apical teeth.

Thorax: Black, densely whitish-grey dusted. Prosternum bare. Ground-setulae of postpronotal lobe setulose, not spinulose. Scutum with 2 distinct brown longitudinal vittae along dc and with an indistinct brownish vitta between ph and ps seta on each side. Presutural acr in 2 uneven rows; 1 + 3 dc. Two proepisternal setae. Apical and basal scutellars well developed and equal.

Legs: All black with grey dust with the exception of yellow trochanters, joints and basal 1/3 of tibiae. Pulvilli not elongate. Fore tibia with 1 strong long p. Mid femur with 2–3 pv (one seta longer then others) and 2 short av on basal half, with 1 strong a and 2 strong p preapical setae. Mid tibia with 1 ad, 1 pd. Hind femur with 4 av and 1 short pv on basal half and 1 long pv near middle. Hind tibia with 1 short av, 1 strong ad and 1 short pd; median av and ad not close together, preapical ad and d long and strong, subequal in length to median ad, distinct preapical pd not developed, with only 2 weak and short setae below preapical d. .

Wing: Light coloured, with a slight yellow tinge. Costa with weak spinules. Calypters white; lower one hardly longer than upper one. Haltere light yellow.

Abdomen: Black with thick whitish-grey dust, elongate, cylindrical. Tergites 3–5 with pairs of indistinct brownish rounded spots. Sternite 1 bare.

Terminalia: as in Figs. 11 A, 11B.

Female: body 4.2–4.7mm, wing 3.8–4.3mm.

Similar to male, but differing from it as follows: frons with 2 pairs of strong frontal setae and one half as long as these between these setae. Scutum with brownish-grey dust. Haltere yellowish. Mid and hind tibiae black except for yellow bases, fore tibia yellow in basal quarter. Hind femur with 3 av, hind tibia without pd or with very short pd. Abdominal spots indistinct or absent.

Ovipositor: as in Figs. 11 C –E.

Distribution: Russia, Respublika Altay.

Figures

FIGURE 11. C. altaica (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. Female spermatheca. F. Male head, lateral view.