Drymeia longiseta, 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 : 181-183

Drymeia longiseta sp. nov.

Figs. 3 E, 12 A–H, 13A–C

Diagnosis. The species is very similar to D. alpicola (Rondani, 1871) . The new species can be distinguished as follows: prealar long and strong; anepimeron and katepimeron bare; eye bare; fronto-orbital plates in male separated by a broad black frontal vitta; proboscis thin, elongate; parafacial much broader than width of postpedicel; fore and mid coxae in male with long wavy setae, anterior surface of mid femur with a row of very long strong wavy setae which become anteroventral in position on apical half and become shorter at apex, and with complete rows of hair-like anteroventrals, ventrals and posteroventrals, some of them wavy; mid tarsomere 1 in male with the ventral spinules longer than tarsal depth; hind tibia in male with a ventral apical prong and without posteroventrals at apex.

Etymology. The species name refers to the long setae on the male mid femur and fore and mid coxae.

Type material examined. Holotype male, RUSSIA: Altai Republic, Kosh-Agachskii raion, south slope of Kurayskii range, 7 km NW Kuray village, 2251 m, 50º17'N 87º51'E, 17.vii.2013, V. Sorokina ( SZMN).

Paratypes: Altai Republic, Kosh-Agachskii raion: 23 males and 29 females, same data as holotype, but 2251– 2736 m, 17–19.vii.2013; 21 males and 5 females, upper part of Naryn-Gol River, 2520–3000 m, 49º49'N 88º13'Е, 15–19.vii.2009, T. Novgorodova, A. Barkalov, V. Zinchenko & V. Sorokina; 41 males and 21 females, upper part of Zhumaly River, Rodonovyi spring, 2300–2900 m, 49°27'N 88°03'E, 24.vi.2005, 4.vii.2005, 23.vii.2006, 13.vi.2008, V. Sorokina, T. Novgorodova & A. Barkalov; 21 males and 6 females, Ukok plateau, Zerlukol’-Nur lake, 2400 m, 49.56ºN 88.21ºЕ, 23.vi.2005, V. Sorokina & A. Barkalov; 44 males and 10 females, Ukok plateau, environs of Muzdy-Bulak lake, 2400–2900 m, 49.28ºN 87.65ºЕ, 24.vi.–2.vii.2005, 8,10. vii.2008, T. Novgorodova, A. Barkalov & V. Sorokina; 13 males and 2 females, Ukok plateau, environs of Tarkhatinskoe lake, 2300 m, 5.vii.2006, T. Novgorodova; 42 males and 15 females, Ukok plateau, 6–8 km NE Maitobe mountain, 2420–2800 m, 49°34'N 87°43'E, 6–10.vii.2006, V. Sorokina & T. Novgorodova (14 males and 2 females, half each in BMNH & OUMNH); 22 males and 6 females, Ukok plateau, environs of Kal’dzhin-Kul’-Bas lake, 2400–2800 m, 49°19'N 87°26'E, 17–21.vii.2006, V. Sorokina & T. Novgorodova (4 males in BMNH & OUMNH); 3 males and 2 females, Ukok plateau, valley of Ak-Allacha River, 2160 m, 49°25'N 87°37'E, 12,13. vii.2006, V. Sorokina; 2 males, south slope of Yuzhno-Chuyskii range, valley of Tara River, 2800–3300 m, 49.65°N 88.22°'E, 19.vii.2009, A. Barkalov, 3 males and 2 females, 20–25 km NE Kokorya, Saylyugem Mts, 2100–2800 m, 24–25.vi.1999, D. Logunov; Altai Republic, Ulaganskii raion: 5 males and 3 females, environs of Dzhulukul’ lake, 2200 m, 50.47ºN 89.77ºЕ, 21– 26.vii.2007, V. Sorokina & A. Barkalov; 9 males and 2 females, Shapshalskii mountain range, 2878 m, 50.53ºN 89.8ºE, 24.vii.2007, V. Sorokina & A. Barkalov; 11 males and 6 females, Kuraysky mountain range, 2450–2800 m, 50.33ºN 87.75ºЕ, 29–30.vi.2008, 2,3. vii.2008, A. Barkalov; 2 females, 9 km E Aktash, 2400–2500 m, 50º19'N 87º45'Е, 1,2. vii.2008, V. Zinchenko. Tyva Republic: Morgun-Taiginskii kozhuun: 1 male, 3–5 km SE Mugur-Aksy, valley of Kargy River, 1850–2000 m, 22.vii.1993, A. Barkalov; 1 male 1 female, 8–9 km NE Mugur-Aksy, 2700 m, ~ 50º22'N 90º25'E, 22.vii.1993, A. Barkalov; 2 females, Shapshalskii mountain range, upper part of Shui River, 2550–2900 m, 50.53ºN 89.8ºE, 25.vii.2007, V. Sorokina; 5 males and 6 females, east bank of Khindiktig-Khol’ lake, 2334 m, 50.4ºN 89.9ºE, 28.vii.2007, A. Barkalov.

All the above paratypes are located in the SZNM, OUMNH and BMNH except for 3 pairs from Altai Republic deposited in each of the following: ZIN, ZMUM, BUIC.

Description. MALE. Length of body, 6.5–8.5 mm. Length of wing, 5.2–6.3 mm.

Head: Ground-colour black. Eye bare. Fronto-orbital plate and parafacial grey-silver or silver-yellow pruinose; face grey, gena and lower occiput brown pruinose. Fronto-orbital plates separated by a broad black frontal vitta. Frontal vitta as wide as or slightly broader then width of postpedicel. Ocellar setae short. 14–16 pairs of frontal setae, including interstitials, reaching almost to anterior ocellus. Antenna black, postpedicel circa 1.5 times as long as wide. Arista swollen in basal sixth, appearing almost bare, the longest hairs shorter than its basal diameter. Parafacial at level of insertion of arista much broader than width of postpedicel, almost twice as wide, hardly narrowing below. Upper part of face with a carina between antennal bases. In lateral view, facial edge projecting slightly forward beyond the level of profrons. Gena broad, depth below lowest eye-margin equal to 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 in posterior view but in anterior view greenish-brown dusted, with two undusted vittae running along dorsocentrals and another one between them, and two indistinct undusted vittae running along intra-alars; postpronotal lobe, notopleuron, postalar callus and pleura as the scutum. Pleura with a small undusted patch anteriorly on katepisternum and medially on meron. Lower part of katepisternum with long wavy setae. Ground-setulae short. Anepimeron and katepimeron bare. Notopleuron setulose. Prosternum bare. Acrostichals 0+1. Dorsocentrals 2+3(4). Prealar long and strong. Katepisternal setae 1+2(3). Scutellum black and light shining.

Legs: Black. Fore tibia with 4–5 posteroventral setae on apical half. Fore tarsomere 1 without or with a small apical ventral spur. 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 a little longer then length of tarsomere 5. Fore and mid coxae with long wavy setae. Mid femur straight, slightly flattened, with complete rows of hair-like anteroventral, ventral and posteroventral setae but the anteroventrals longer and some of them wavy; anterior surface with a row of very long strong wavy setae which become anteroventral in position on apical half and become shorter and more straight at apex; 0 anterior and 3(4) posterodorsal to posterior preapical setae. Mid tibia with complete rows of all setae (anterodorsal, anterior, anteroventrals, ventral, posteroventral, posterior, posterodorsal) but dorsal setae much longer then ventrals, and ventral setae on apical 2/3. Mid tarsomere 1 with the ventral spinules longer than tarsal depth. Hind femur with complete rows of anteroventrals and posteroventrals, but the posteroventrals finer and more hair-like on basal half. Hind tibia with numerous long and intermediate short setae on anterior, posterior and dorsal surfaces; ventral surface without strong long setae but with a brush of short weak erect setae; anterodorsals and posterodorsals much longer than the others; with a ventral apical prong and with strong anteroventral setae at its tip but without or with fine posteroventral apicals.

Wing: Light brownish, darker 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 forming a right-angle with vein M but sinuous, S-shaped. Calypters white-yellow, margins yellow. Knob of haltere black.

Abdomen: Cylindrical, elongate, black and light shining. In posterior view with brown dust on tergites 3–5 except for the undusted median triangles. Sternite 1 bare (sometimes with a pair of setulae). Sternite 5 swollen ( Fig. 12 H). Tergite 5 with numerous long strong setae. Epandrium with numerous hair-like wavy setae.

Terminalia : Figs 12 E–G.

FEMALE. Length of body, 6.2–9.5 mm. Length of wing, 5.2–6.7 mm.

Differs from the male as follows:

Head: Dichoptic. Frons at middle 0.38 of head-width at this point, and at this point each fronto-orbital plate 0.5 times width of frontal vitta. Frontal triangle inconspicuous, visible from above, reaching the crossed setae on frontal vitta, light shining. Ocellar setae strong. 3–4 pairs of strong inclinate frontal setae and several shorter weak 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 light shining in posterior view, in anterior view with the greenish-brown dust more dense, without distinct undusted vittae. Setae on lower part of katepisternum not wavy. Katepisternal setae 1+2.

Legs: Fore tibia with 2–4 posteroventral setae on apical half. Fore tarsomeres 1–4 with a dense brush of short setulae. All claws and pulvilli much shorter. Fore and mid coxae without long wavy setae. Mid femur with complete rows of anteroventral and posteroventral setae but the posteroventrals on basal half much longer; anterior surface without a row of very long strong wavy setae; 0 anterior and 2 posterodorsal to posterior preapical setae. Mid tibia with 4–5 long and short anterodorsals, 4–6 short anteroventrals, 1 long and 2–4 weak short posteroventrals and 4–5 long posterodorsals, without anterior and posterior setae. Mid tarsomere 1 with the ventral spinules much shorter than tarsal depth. Hind femur with complete rows of anteroventrals and fine posteroventrals which are longer on basal half. Hind tibia with 4–5 anterodorsals, 5 posterodorsals, 5 anteroventrals on apical half, 0 posteroventral setae; without a ventral apical prong and with a long apical seta.

Wing: Yellowish-brown tinged, yellowish at base.

Abdomen: Shining black with light brown dust.

Ovipositor: Figs 13 B, C.

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

Distribution. Russia: Altai-Sayan region.

Figures

FIGURE 3. Drymeia spp. A – D. Drymeia alpicola. A – C. Male terminalia. A. Lateral view. B. Postero-lateral view. C. Posterior view. D. Female head, lateral view. E. Drymeia longiseta (paratypes), Female head, lateral view. F – K. Drymeia chillcotti. F. Male head, anterior view. G. Mid femur. H – K. Male terminalia. H. Lateral view. I. Postero-lateral view. K. Posterior view.

FIGURE 12. Drymeia longiseta (paratypes), male. A. Habitus, lateral view. B. Head, anterior view. C. Abdomen, dorsal view. D. Mid metatarsus. E – G. Terminalia. E. Lateral view. F. Postero-lateral view. G. Posterior view. H. Sternite 5.

FIGURE 13. Drymeia longiseta (paratype), female. A. Habitus, lateral view. B, C. Female, apical portion of ovipositor. B. Dorsal view. C. Ventral view.