Cheilosia circassica, Stahls, Gunilla & Barkalov, Anatolij V., 2017

Stahls, Gunilla & Barkalov, Anatolij V., 2017, Taxonomic review of the Palaearctic species of the Cheilosiacaerulescens-group (Diptera, Syrphidae), ZooKeys 662, pp. 137-171 : 146-149

Cheilosia circassica sp. n. Fig. 6

Type material studied.

Holotype, ♂, pinned, with genitalia dissected in microvial, in ZIN. The holotype is labelled: 'Teberdinskij zapov., okr. Usad’by, Kavkaz, Gorodkov, 9.VII.[1]968', 'g. Mal. Khatipara, verch. granitsa lesa, 2400 m’, 'subalpinskij lug’ [Teberdinskii reserve, mountain Malaia Khatipara, close to border forest, 2400 m, subalpine meadow] [North Caucasus, Karastschaevo-Tscherkessia].

Paratype, 1 ♂, Teberdinskij reserve, mountain Malaia Khatipara, 1400-2000 m 14.VII.1982 (Lukashova) (ISEA).

Description.

♂: Face in frontal view slightly divergent from level of antennal insertion to lower mouth edge, with weak narrow strip of pollinosity (Fig. 6A). Facial knob rounded, not very protruding, shining. Parafacia pollinose in upper part and shining in lower part. Parafacia in its broadest part slightly more than 1/2 the width of basoflagellomere. Frons very slightly swollen, shining, with dense white wavy pile. Frontal angle ≈ 90°. Lunula brown. Antennal pits confluent. Vertical triangle with white pile. Eye-contiguity shorter than the length of frons without lunula. Basoflagellomere yellowish brown, rounded (Fig. 6B). Arista with short pile. Scutum, scutellum and pleura shining, with only very pale yellowish (almost whitish) pile, longer pile on pleura and posterior part of scutum distally wavy. Scutum and scutellum completely without black bristles or bristly like pile. Postalar callus without black bristles. Anepisternum and katepisternum shining, with white pile. Katepisternum with dorsal and ventral hair patches connected. Legs mainly black, knees narrowly yellow, tibiae also narrowly yellow at the extreme tip, 1-3 segments of meso and 2-3 segments of metatarsi yellowish. Apical half of posterior surface of mesofemur with long light pile. Metafemur with short and long white pile ventrally, apicoventrally with a few black pile. Halter yellow. Wing with all cross-veins darkened, completely microtrichose, R4 + 5 of wing not distinctly curved. Abdomen oval, shining, densely punctated. Pile erect and white, longer on the lateral parts and shorter on the central parts of tergites. Sternite I with pollinosity, sternites II–IV shining, pile erect, white. Hypopygium as on Fig. 6 D–F.

Size. Body length 9 mm.

Etymology.

The specific name means "from Tscherkessia" in Latin and English.

Additional material studied.

No additional material available.

Distribution.

Russia (Caucasus).

Remark.

Female unknown.