Drymeia grandis, 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 : 173-177

Drymeia grandis sp. nov.

Figs. 8 A–H, 9 A–C

Diagnosis. The species is similar to D. vicana ( Harris, 1780) . The new species can be distinguished as follows: prealar absent, sometimes present in female; anepimeron haired, katepimeron bare or with a few hairs; eye with very short sparse hairs; proboscis thickened, short; mid femur straight, in male with a few short anteroventral setae on apical third, with a row of short spinules near base, in female with 2 strong setae on basal quarter; posteroventral surface with row of short fine setae; hind femur without posteroventrals; hind tibia in male with a small ventral apical prong, without posteroventral apical seta; tip of abdomen in male with several caudally directed setulae on hypopygium.

Etymology. The species name is the Latin adjective “ grandis ” which means “great” or “grand”.

Type material examined: Holotype male, RUSSIA: Altai Republic, Kosh-Agachskii raion, upper part of Naryn-Gol River, 2520 m, 49º49'N 88º32'Е, 16–19.vii.2009, V. Sorokina ( SZMN).

Paratypes: 18 males 5 females, same data as holotype (1 male and 1 female OUMNH); Altai Republic, Kosh- Agachskii raion: 2 males and 1 female, south slope of Kurayskii range, 7 km NW Kuray village, 2251 m, 50º17'N 87º51'E, 17.vii.2013, V. Sorokina (1 male in OUMNH); 1 male, Ukok plateau, environs of Muzdy-Bulak lake, 2400 m, 49.28ºN 87.65ºЕ, 2.vii.2005, V. Sorokina; 1 female, Ukok plateau, valley of Ak-Allacha River, 2160 m, 49°25'N 87°37'E, 12,14. vii.2006, V. Sorokina & T. Novgorodova; 11 females, south slope of Yuzhno-Chuyskii range, valley of Tara River, 2175 m, 49º39'N 88º13'E, 30.vi.2006, V. Sorokina, 1–4.vii.2006, V. Sorokina & T. Novgorodova, 2200 m, 11.vii.2009, V. Sorokina; 9 females, 10–18 km SE Dzhazator, 1700–2115 m, 49°37'N 87°39'E, 5.vii.2006, V. Sorokina; 2 males, upper part of Zhumaly River, Rodonovyi spring, 2412 m, 49°27'N 88°03'E, 24.vii.2005, V. Sorokina & A. Barkalov; 3 females, north slope of Severo-Chuyskii range, valley of Akturu River, 1865–2065 m, 50º06'N 87º48'E, 21.vii.2013, V. Sorokina & T. Novgorodova (1 female in OUMNH); Altai Republic, Ulaganskii raion: 1 female, environs of Kara-Kudyur, 50.71ºN 87.81ºE, 24.vii.2003, A. Barkalov; 5 females, 3 km S Aktash, 1360 m, 50.28ºN 88.67ºЕ, 16.vii.2003, V. Sorokina; Altai Republic, Shebalinskii raion: 1 female, environs of Ulus-Cherga, 27.vii.2008, O. Kosterin ( ZMUM). Ust’-Koksinskii raion: 2 females, 6.5 km SE Mul’ta, 1026 m, 50º07'N 86º01'E, 12–15.vii.2013, V. Sorokina. Altai Krai, Krasnoshekovskii raion: 2 males and 3 females, 6 km NW Kharlovo, valley of Berezovka River, 1.vi.2004, V. Sorokina; 1 male, 1 km S Suetka, 26.v.2004, V. Sorokina. Khakasiya: Shirinskii raion, 5 females, environs of Shira salt lake, 350–355 m, 54.48ºN 90.17ºE, 21–24.vi.2011, K. Tomkovich ( ZMUM). Tyva Republic: Morgun-Taiginskii kozhuun, 1 female, environs of Mugur-Aksy, 2000–2100 m, ~ 50º22'N 90º25'E, 22.vii.1993, A. Barkalov; Ovyurskii kozhuun, 1 female, 14 km N Khandagaity, 1600 m, ~ 50º43'N 92º04'E, 25.vii.1993, A. Barkalov; Tes-Khemskii kozhuun, 1 female, 1.5 km, W Samagaltay, ~ 50º36'N 95º00'E, 13–14.vii.1993, A. Barkalov ( SZMN).

All the above paratypes collected by the author are located in the SZMN except for 2 pairs from Altai Republic deposited in each of the following: ZIN, ZMUM, OUMNH, BMNH and BUIC.

Description. MALE. Length of body, 6.5–7.7 mm. Length of wing, 4.8–6.0 mm.

Head: Ground-colour black. Eye with very short sparse hairs. Fronto-orbital plate and parafacial silvery-white pruinose; face grey, gena and lower occiput light grey pruinose. Fronto-orbital plates touching. Frons at narrowest point 1.5 times as wide as width of anterior ocellus. Ocellar setae short. 17–18 pairs of frontal setae, including interstitials, reaching almost to anterior ocellus. Antenna black, postpedicel circa 2 times as long as wide. Arista swollen in basal sixth, appearing almost bare, the longest hairs shorter than basal diameter of arista. Parafacial at level of insertion of arista slightly broader than postpedicel, hardly narrowing below. Upper part of face with a low carina between antennal bases. In lateral view, facial edge not projecting forward beyond the level of profrons, sometimes behind 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 thickened, short. Prementum of proboscis dusted, as long as palpus.

Thorax: Ground-colour black. Scutum matt, black, viewed from in front with two grey vittae running inside, not reaching scutellum, and two indistinct vittae running outside the line of the dorsocentrals, reaching scutellum; postpronotal lobe, notopleuron and postalar callus light grey dusted. Ground-setulae short. Pleura light grey dusted, with a shining patch anteriorly on katepisternum and medially on meron. Anepimeron haired. Katepimeron bare or with few hairs. Acrostichals 0+1, the presutural setulae in 6 irregular rows. Dorsocentrals 2+4. Prealar absent. Notopleuron densely setulose. Prosternum bare. Katepisternal setae 1+1. Scutellum black and dusted in posterior view.

Legs: Black. Fore tibia with 3 posteroventral setae on apical half. Fore tarsomeres 1–4 each with a short fine anteroventral and posteroventral hair at tip, fore tarsomere 1 without posteroventrals at apex. Fore claws as long as length of tarsomere 5, thin and pointed, but often short, blunt and obviously broken, shorter than length of tarsomere 5. Pulvilli as long as tarsomere 5. Mid femur straight, slightly flattened, with a few short anteroventral setae on apical third, none as long as femoral depth, and with a row of short spinules near base; anterior surface with a row of long setae on basal half; posteroventral surface with a row of short fine setae and with a group of longer fine curved setae at base; 0 anterior and 1–2 posterodorsal to posterior preapical setae. Mid tibia with 1–2 anterodorsal setae and without anteroventrals; 6–7 posterodorsals, 3–4 posteroventrals. Hind femur without posteroventrals, but with a group of fine setae on anterior to posterior surfaces near base; with 6–8 strong anteroventral setae on apical half and a few fine setae on basal half. Hind tibia with 5–8 posterodorsals on basal half that become shorter at base; with a row of 9–11 uneven anterodorsals that are longer around middle; 3–4 anteroventrals on middle part; 2 uneven rows of weak short posterior and posteroventrals on middle part; with a small ventral apical prong; without a dorsal but with an anterodorsal preapical; with an anterior and short anteroventral apical seta but 0 posteroventral apical. Hind tarsomere 1 with 1 short ventral seta at base.

Wing: Faintly yellow, conspicuously so 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 oblique, sinuous. Calypters and margins yellow. Knob of haltere black.

Abdomen: Conical, ground-colour black. Densely white-grey or yellow-grey dusted. Viewed from behind, syntergite 1+2 with an inverted triangular undusted mark; tergites 3–5 each with a black median line that becomes narrower towards the tip of abdomen. Sternite 1 bare. Sternite 5 swollen ( Fig. 8 D).

Terminalia : Figs 8 E–H.

FEMALE. Length of body, 5.0– 7.8 mm. Length of wing, 4.2–5.5 mm.

Differs from the male as follows:

Head: Dichoptic. Frons at middle 0.42 of head-width at this point, and at this point each fronto-orbital plate 0.26 of frontal vitta. Head yellow-grey or light grey dusted. Frontal triangle inconspicuous, not reaching the crossed setae on frontal vitta. Ocellar setae strong. 6–7 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: Scutum densely grey or yellow-grey dusted, with two indistinct brown vittae running along dorsocentrals and sometimes with vittae running between them, all vittae more distinct after suture. Pleura and scutellum dusted as scutum. Ground-setulae very short. Dorsocentrals 2(3)+4. Prealar absent or present, but shorter than 2nd notopleural. Katepisternal setae 1+1, sometimes with 2–3 stronger setulae below posterior seta.

Legs: Fore tibia with 1–2 posteroventral setae on apical half. Mid femur straight; anteroventral surface with 2 strong setae on basal quarter; posteroventral surface with 4–5 setae on basal quarter, followed by a series of rather longer setulae that become finer towards base, and with a few fine setae on posterior to posteroventral surface at base. Mid tibia with 3–4 anterodorsals, also without anteroventrals; 5–7 posterodorsals, 2–3 posteroventrals. Hind femur without posteroventrals, but with a few fine setae on ventral to posterior surfaces near base; with 6 strong anveroventral setae on apical half and a row of sorter setae on basal half. Hind tibia with 4–5 posterodorsals that become shorter at base; with a row of 4–5 anterodorsals; 4–5 anteroventrals on middle part. Dorsal preapical seta strong, and anterodorsal preapical half its length; 1 anteroventral but 0 posteroventral apical setae.

Wing: Yellowish tinged, especially at base.

Abdomen: Grey dusted, tinged with yellow. Viewed from behind, tergites 3–5 each with a dark indistinct narrow vitta, more distinct on tergite 5. Without strong setae.

Ovipositor: Figs 9 B, C.

Remark. Females are abundant sweat flies.

Distribution. Russia: Altai Krai, Altai Mts and Khakasiya.

Figures

FIGURE 8. Drymeia grandis (paratypes), male. A. Habitus, lateral view. B. Head, anterior view. C. Abdomen, dorsal view. D. Sternite 5. E – H. Terminalia. E, F. Lateral view (variation of the shape of the surstyli). G. Postero-lateral view. H. Posterior view.

FIGURE 9. Drymeia grandis (paratype), female. A. Habitus, lateral view. B, C. Female, apical portion of ovipositor. B. Dorsal view. C. Ventral view.