Cheilosia (Montanocheila) teneripilosa, Barkalov, 2020

Barkalov, Anatolij V., 2020, New data on the genus Cheilosia Meigen (Diptera, Syrphidae) from Central Asia with descriptions of two new species and a key to the ‘ group C’, Zootaxa 4860 (2), pp. 243-256 : 244-246

Cheilosia (Montanocheila) teneripilosa sp. nov.

Figs 1 A–F

Type material. HOLOTYPE. Kyrgyzstan: 1♂ Ak-Shyrak-East, Mountain ridge, W of Ak-Bel Pass, 41.75° N 78.7° E, 4190 m a.s.l., 09.vii.2015, leg. D. Milko, SZMN . PARATYPE. 1♀, same place, date and collector as the holotype, SZMN .

Differential diagnosis. The new species belongs to the subgenus Montanocheila , and is similar to C. milkoi Barkalov, 2005 , C. zlotini Peck, 1969 and C. vtorovi Peck, 1969 . From all of these species, C. teneripilosa sp. nov. differs by the following set of characters: eyes with long black hairs, legs of male completely black, abdomen predominantly with light hairs, superior lobe of hypandrium with very small left process ( Fig. 1D ).

Description. MALE. Size. Body length 12.3 mm; wing length 10 mm. Head ( Fig. 1A ). Face broad, distinctly broadened ventrally, black, shiny with fine grey dusting denser under antennae base, ventrally with narrow strip of microtrichia, without distinct hairs, shiny stripe without dusting laterally. Central knob distinct but not prominent, shiny, without dusting. Eye-margin broad, black, shiny, with fine brownish dusting and long black hairs. Genae very high, covered with grey dusting and long black hairs, some yellow hairs posteriorly. Frons distinctly swollen, broad, shiny, covered with long black hairs, frontal angle more than 100°. Lunula dark-brown almost black; anten- nal pits distinctly separated.Antennae black, scapus and pedicel with grey dusting, postpedicel comparatively small, rounded, black with brownish postero-ventral angle, covered with brown dusting ( Fig. 1C ); arista long, gradually tapering, bare, black. Eyes covered with long dense black hairs, eye contiguity approximately equal to frons length without lunula. Vertex swollen, covered with grey dusting and long black hairs, ocellar triangle equilateral. Occiput covered with long black and yellow hairs. Thorax. Pronotum black with fine grey dusting and black hairs. Scutum black with fine granulation, and dense long erect fine black hairs with half-length white hairs, some long white hairs near scutellum. Scutellum black, covered with long, fine black and yellow hairs, without any bristles. Pleura black with grey dusting and dense long fine black hairs. Legs black with black long hairs; fore coxa without lateral spur. Wing translucent, with brownish base, completely covered with microtrichia, inner angle between veins M 1 and R 4+5 acute. Haltere with yellow pedicel and black capitulum. Calypters yellow with white cilia. Abdomen elongated, in the broadest part distinctly narrower than scutum at the level of wing base; shiny black, tergites II–III with brownish dusting medially, covered with long, dense, erect, mostly light-yellow hairs, black hairs on lateral sides of tergites. Sternites black, matt, with black hairs. Hypopygium as in Figs 1 D–F.

FEMALE ( Fig. 1B ). Body length 12.3 mm, wing length 10.5 mm. Face as in male, cheeks with long lightyellow hairs. Frons rather broad with three distinct longitudinal furrows ( Fig. 1B ), in anterior half with transversal stripe of grey dusting, covered with long erect white hairs, some black hairs in posterior half. Lunula light-brown; scapus and pedicel brownish, postpedicel comparatively small, broadly brown postero-ventrally, covered with dense grey-brown dusting. Vertex with long black and some white hairs. Scutellum and scutum with long black and white hairs and with dense white hairs that are 2–3 times shorter. Legs black, tibiae in basal 1/3–1/2 and on tips brownish. Abdomen oval, in the broadest part equal scutum width on level of wings base, shiny black, covered with white hairs longer laterally.

Etymology. The specific epithet ‘ teneripilosa ’ reflects a characteristic feature of the species: the presence of delicate hairs on the body (‘tener’, gentle or soft; ‘pilosa’, hairy, both in Latin).

Figures

FIGURE 1. Cheilosia teneripilosa sp. nov. A: head of male, lateral view. B: head of female, dorsal view. C: pedicel and postpedicel of male, lateral view. D: superior lobe of hypandrium, lateral view. E: aedeagus with apodeme. F: surstylus and gonocercus, lateral view; l. p., left process of superior lobe; r. p., right process of superior lobe. Scale bar in mm.