Gimnomera cuneiventris ( Zetterstedt, 1846 )

Ozerov, A. L., 2019, A review of the genus Gimnomera Rondani, 1866 (Diptera: Scathophagidae) of Russia, Russian Entomological Journal 28 (2), pp. 195-218 : 201

Gimnomera cuneiventris ( Zetterstedt, 1846)

Figs 11 , 33–35 .

cuneiventris Zetterstedt, 1846: 2020 ( Cordylura ). Type-locality: “Lapponia Lulensi; ad Qvickjock in summitate alpis Snjerak” (nr Kvikkjokk, Norrbotten, Sweden).

Noted by Gorodkov from Kola Peninsula [ Gorodkov, 1970] and for European part of Russia without indicating specific locality [ Gorodkov, 1986], also from Magadan Oblast [ Ozerov & Krivosheina, 2014].

MATERIAL. Chukotka: the upper reaches of the Bol’shaya River (63.0185ºN 171.8464ºE), 23.VII.1959, Gorodkov (1 ♂, ZISP); Krasnoyarsk Krai: Khatanga (71.9758ºN 102.4824ºE), 11– 12.VII.1970, Zherikhin , Sukacheva (1 ♂, ZMUM); Tyumen’ Oblast: Labytnangi env. (66.6611ºN 66.3945ºE), VII.1971, Ol’shvang (2 ♂♂, in ZISP); Neroyka (ca. 64.57ºN 59.67ºE), 850 m, 24– 27. VI .1990, Malozemov (1 ♂, ZISP) .

DESCRIPTION. Male. Small-sized flies (2.7–3.1 mm long).

Head. Frontal vitta from yellow to black, matt; fronto-orbital plate black, whitish dusted. Ocellar triangle black. Face and parafacial from yellow to black, whitish dusted. Gena yellow completely or blackish in anterior half, whitish dusted. Postcranium black, but yellowish along lower margin, usually subshining in upper third and greyish dusted in lower part. 2–3 orbitals, 2 frontals (additionally fronto-orbital plate with a row of small hairs), 1 ocellar, 1 small postocellar, 1 inner vertical, 1 outer vertical; 1–2 pairs of vibrissae present. Scapus and pedicel dark brown. Postpedicel black, no more than 1.5 times as long as wide. Arista black. Palpus yellow.

Thorax black, greyish dusted. Scutum densely covered with small yellow hairs, including acrostichal area; dorsocentrals 0+1, intra-alars absent, supra-alars 0+1, postpronotal absent, anterior margin of postpronotum with short erect black spinules, notopleurals 2, postalars 1–2. Proepisternum with 1 seta near lower margin. Proepimeron with 1 seta and several hairs. Anepisternum with 2 setae near posterior margin. Anepimeron with several hairs. Scutellum black, with a pair of lateral scutellar and a pair of apical scutellar setae.

Legs yellow, only tarsi of all legs darkened. Fore femur with a row of posterodorsal setae. Fore tibia with 1 dorsal/anterodorsal seta, 1 posterior and 1 preapical dorsal setae. Mid femur with 1 preapical posterodorsal seta. Mid tibia with 1 anterodorsal, 0–1 posterior, 1 preapical dorsal setae and a ring of apical setae. Hind femur with 1– 4 anterodorsal setae in apical half and 0–1 preapical anterior seta. Hind tibia with 1 anterodorsal, 1 preapical dorsal setae, also with 1 apical anteroventral seta.

Wing clear; veins brownish. Vein R 1 setulose on apical half of dorsal surface. Calypters, margins of calypters, and halteres pale yellow.

Abdomen black, subshining. Male sternite 4 oval, slightly wider than long; sternite 5 transverse oval, with shallow median lobes, covered with spinules ( Fig. 11 ). Epandrium, cercal plate and surstyli as in Figs 33–35 .

DISTRIBUTION. Russia: Chukotka, Magadan Oblast, Kola Peninsula, Krasnoyarsk Krai, Tyumen’ Oblast. — Europe [ Šifner, 2008] .

Figures

Figs 8–13. Male sternites 4 (lower) and 5 (upper) of Gimnomera: 8 — G. alanica (Ozerov); 9 — G. albipila (Zetterstedt); 10 — G. castanipes (Becker); 11 — G. cuneiventis (Zetterstedt); 12 — G. dorsata (Zetterstedt); 13 — G. hirta (Hendel). Рис. 8–13. Стерниты 4 (вниЗу) и 5 (вверху) самца Gimnomera: 8 — G. alanica (Ozerov); 9 — G. albipila (Zetterstedt); 10 — G. castanipes (Becker); 11 — G. cuneiventis (Zetterstedt); 12 — G. dorsata (Zetterstedt); 13 — G. hirta (Hendel).

Figs 33–41. Epandrium, cercal plate and surstyli of Gimnomera spp.: 33–35 — G. cuneiventis (Zetterstedt); 36–38 — G. dorsata (Zetterstedt); 39–41 — G. hirta (Hendel); 33, 36, 39 — dorsolateral view; 34, 37, 40 — lateral view; 35, 38, 41— dorsal view. Рис. 33–41. Эпандрий, церки и сурстили Gimnomera spp.: 33–35 — G. cuneiventis (Zetterstedt); 36–38 — G. dorsata (Zetterstedt); 39–41 — G. hirta (Hendel); 33, 36, 39 — дорсолатерально; 34, 37, 40 — сбоку; 35, 38, 41 — сверху.