Drymeia glabra, Sorokina, Vera S. & Pont, Adrian C., 2015

Sorokina, Vera S. & Pont, Adrian C., 2015, A review of the genus Drymeia Meigen, 1826 (Diptera: Muscidae) in Russia, Zootaxa 4000 (2), pp. 151-206 : 171-173

Drymeia glabra sp. nov.

Figs. 7 A–H

Diagnosis. The species is very similar to D. fasciculata ( Stein, 1916) . The new species can be distinguished as follows: prealar seta long and strong; anepimeron and katepimeron bare; proboscis thin, elongate; eye bare; body shining black, without dusted markings; facial edge projecting forward beyond the level of profrons; notopleuron bare or with individual setulae around posterior notopleural seta; mid femur in male with a row of fine relatively short anteroventral setae and 4–5 stronger setae on apical 1/3, long posteroventral setae only on basal half; hind tibia in male with a small ventral apical prong, without any strong apical setae.

Etymology. The species name is based on the Latin adjective “glaber” what means “smooth”.

Type material examined. Holotype male, RUSSIA: Altai Republic, Ulaganskii raion, Shapshalskii mountain range, 2878 m, 50.53ºN 89.8ºE, 23.vii.2007, V. Sorokina ( SZMN).

Paratypes: 2 males and 4 females, same data as holotype ( SZMN); 1 male 1 female, the same but 24.vii.2006, V. Sorokina ( OUMNH); Altai Republic, Kosh-Agachskii raion: 3 males and 3 females, Ukok plateau, environs of Muzdy-Bulak lake, 2400–2600 m, 49.28ºN 87.65ºЕ, 26.vi.2005, A. Barkalov, 2600–2800 m, 1.vii.2005, V. Sorokina (1 female each ZIN & ZMUM, rest in SZMN); 1 male, Ukok plateau, 5–6 km NE Maitobe mountain, Pass Bugymuyz, 2800 m, 49°34'N 87°43'E, 11.vii.2006, V. Sorokina & T. Novgorodova ( SZMN); 1 male, Ukok Plateau, 6 km NE Maitobe mountain, 2400–2700 m, 49°34'N 87°43'E, 08.vii.2006, T. Novgorodova ( OUMNH); 4 males, south slope of Yuzhno-Chuyskii range, 2600–2800 m, 49º39'N 88º13'E, 1.vii.2006, V. Sorokina (1 male each in ZIN & ZMUM, rest in SZMN). Altai Mts: 4 males and 4 females, Shapshalskii mountain range, upper part of Shui River, 2550–2900 m, 50.53ºN 89.8ºE, 25.vii.2007, V. Sorokina ( SZMN).

Description. MALE. Length of body, 5.2–5.8 mm. Length of wing, 4.3 mm.

Head: Ground-colour black. Eye bare. Parafacial brownish-grey, light silver pruinose; fronto-orbital plate and gena dark brown pruinose; face and lower occiput dark brown pruinose; gena and lower occiput light, shining. Fronto-orbital plates touching, sometimes with a very narrow frontal vitta. Frons at narrowest point 1.5 times as wide as diameter of anterior ocellus. Ocellar setae short. 12–14 pairs of frontal setae, including interstitials, reaching almost to anterior ocellus. Antenna black, postpedicel circa 1.2 times as long as wide. Arista swollen in basal sixth, appearing almost bare, the longest hairs much shorter than basal diameter of arista. Parafacial at level of insertion of arista as wide as or slightly broader than width of postpedicel, hardly narrowing below. Upper part of face with a carina between antennal bases. In lateral view, facial edge projecting forward beyond the level of profrons. Gena broad, depth below lowest eye-margin equal to or slightly broader than length of postpedicel, densely setose and with a group of upcurved setae on anterior part of genal dilation. Palpus black. Proboscis thin, elongate. Prementum of proboscis dusted, as long as palpus.

Thorax: Ground-colour black. Scutum shining, black but when viewed from in front with light brown dust, without vittae; postpronotal lobe, notopleuron and postalar callus shining, and pleura light brown dusted. Groundsetulae short. Pleura with an undusted patch anteriorly on katepisternum and medially on meron. Anepimeron and katepimeron bare. Notopleuron bare or with individual setulae around posterior notopleural seta. Prosternum bare. Acrostichals 0+1. Dorsocentrals 2+4. Prealar long and strong. Katepisternal setae 1+1. Scutellum black and light shining.

Legs: Black. Fore tibia with 2–3 weak posteroventral setae on apical half. Fore tarsomere 1 without posteroventrals at apex. Fore claws as long as length of tarsomere 5, thin and pointed. Pulvilli as long as tarsomere 5. Mid femur straight, slightly flattened, with a row of fine anterior and anteroventral setae and 4–5 stronger setae on apical 1/3; with a row of fine posteroventral setae which are longer on basal half; 0 anterior and 2–3 posterodorsal to posterior preapical setae. Mid tibia with 2–3 anterodorsal setae and without anteroventrals; 4–6 posterodorsals, 3–4 short posteroventrals and 3–4 weak ventrals. Hind femur with long dense setae on anteroventral, posteroventral and ventral surfaces on basal 2/3; with 6–7 strong anteroventral setae on apical half. Hind tibia with 3–4 long posterodorsals on basal half and some short setae between them; with 5–6 fine short anteroventrals and posteroventrals on middle part; with 4–5 erect setae at middle on posterior surface and numerous short erect setae on anterior surface; with a ventral apical prong and without any strong apical setae except for a short anteroventral seta on the prong. Hind tarsomere 1 with 2 short ventral setae at base.

Wing: Brownish, very dark at base. Basicosta and tegula black. Costa with weak spinules, without costal spine. Cross-vein r-m below the point where subcosta enters costa. Cross-vein dm-cu upright, almost straight, forming a right-angle with vein M. Calypters dark yellow (lower one sometimes brown), margins brown. Knob of haltere black.

Abdomen: Conical, shining black. In posterior view with light brown dust on lateral margins of tergites 3–5. Sternite 1 bare. Sternite 5 ( Fig. 7 F).

Terminalia : Figs 7 C–E.

FEMALE. Length of body, 5.3–6.2 mm. Length of wing, 4.2–5.0 mm.

Differs from the male as follows:

Head: Dichoptic. Frons at middle 0.43 of head-width at this point, and at this point each fronto-orbital plate 0.5 times width of frontal vitta. Head brown dusted. Frontal triangle inconspicuous, hardly reaching the crossed setae on frontal vitta. Ocellar setae strong. 5–6 pairs of inclinate frontal setae, including several interstitials; 3–4 pairs of orbital setae, the upper two pairs reclinate and exclinate, the lower pair(s) proclinate and exclinate. Frontal vitta with a pair of strong crossed setae.

Thorax: As in male, but notopleuron bare.

Legs: Black. Fore tibia with 2 posteroventral setae on apical half. All claws and pulvilli much shorter. Mid femur straight, anteroventral surface with 2 strong setae on basal quarter and 4 strong setae on apical third; posteroventral surface with 2–3 fine setae on basal quarter. Mid tibia with 2–3 anterodorsal setae and with one anteroventral on apical half; 4–5 posterodorsals and 1–2 short posteroventrals. Hind femur with some fine posteroventral setae on basal half; anteroventral surface with 6–7 strong setae on apical half and with short fine setae on basal half. Hind tibia with 3–4 long posterodorsals on middle part; with 4 short anteroventrals and 2–4 anterodorsals; with strong apical setae on anterior and ventral surfaces.

Wing: Yellowish-brown tinged, dark yellow at base.

Abdomen: As in male.

Ovipositor: Figs 7 G, H.

Remark. Adults of this species are found on flowering plants.

Distribution. Russia: Altai Mts.

Figures

FIGURE 7. Drymeia glabra (paratypes). A. Male habitus, lateral view. B. Male head, anterior view. C – E. Male terminalia. C. Lateral view. D. Postero-lateral view. E. Posterior view. F. Sternite 5. G, H. Female, apical portion of ovipositor. G. Dorsal view. H. Ventral view.