Ephydra scholtzi Becker, 1896

Krivosheina, M. G. & Ozerov, A. L., 2021, A review of the shore-fly genus Ephydra Fallén, 1810 (Diptera: Ephydridae) of Russia, Russian Entomological Journal 30 (3), pp. 345-360 : 357-358

Ephydra scholtzi Becker, 1896

Figs 2 , 14 , 23 , 32 , 41 .

scholtzi Becker, 1896: 220 ( Ephydra ). Type-locality: “Bre-

slau” [= Wrocław in Silesia] ( Poland). krogerusi Frey, 1930: 93 ( Ephydra ). Type-locality: Karelian

Isthmus, Sakkola, Valkjarvi, Siikajoki, Karlo ( Russia). strandi Duda, 1942: 28 ( Ephydra ). Type-locality: “Nidden”

[= Nida on Kuršiu Peninsula] ( Lithuania).

MATERIAL. Amur Oblast: 52 km N of Zeya Town (54.087ºN

126.871ºE), 5.VII.1978, A. Shatalkin (1 ♂, ZMUM); Kamchatka

Krai: Koryaki (53.280ºN 158.210ºE), 50 km W of PetropavlovskKamchatsky, shallow, 21.VII.1978, A. Zinoviev (1 ♂, ZISP) ;

Kozyrevsk (56.049ºN 159.865ºE), shore of River Kamchatka, 27. VI .1984 , N. Krivosheina (1 ♂, ZMUM); Kronotskiy Nature Reserve (ca. 54.749ºN 160.724ºE), 28. VIII .1985 , L. Lobkova (1 ♂, ZMUM); Leningrad Oblast: Nizhnyaya Bronna (59.921ºN 29.621ºE), 28.VII.1918, A. Stackelberg (1 ♀, ZISP); Sestroretsk (60.0916ºN 29.956ºE), 19. VIII , A. Stackelberg (1 ♂, 1 ♀, ZISP); Leningrad env. (59.878ºN 29.069ºE) , 13.VII.1984, 25.VII.1984, M. Krivosheina (11 ♂♂, ZMUM); Nizhegorod Oblast: Dzerzhinsk (56.21ºN 43.62ºE) , 16–18. VIII .2009 , N. Vikhrev (1 ♂, ZMUM); Yakutia: Lensk (60.727ºN 114.943ºE), 14.IX.1987, K. Gorodkov (1 ♂, ZISP) ;

ADDITIONAL MATERIAL. Kazakhstan: sands Kyzylkum, 30 km S of Samarskoe (ca. 48.716ºN 83.352ºE), 3–4. VIII .1987, E. Nartshuk (1 ♂, 6 ♀♀, ZISP); Mongolia: Central aimag [= Töv aimag], 20 km S of Ulan-Bator (ca. 47.717ºN 106.925ºE), 2.VII. 1967, V . Zaitsev (1 ♂, ZISP); Tadjikistan: Stalinabad [= Dushanbe (38.569ºN 68.774ºE)], 8.VII.1945, V . Gussakovskiy (1 ♂, ZISP) .

DESCRIPTION. Head ( Fig. 2 ) silvery-grey pollinose except metallic shining frontal vitta and upper face, with bluish-greenish tinge; fronto-orbital plate grey pollinose. 3 long fronto-orbital setae, anterior interfrontal seta strong, a little shorter, than ocellar. Postocular setae short and thin. Palpus grey. Antenna blackish, greyish dusted; arista very short pubescent on dorsal surface on basal 1/2 ( Fig. 2 ). Gena and parafacial silvery-grey dusted.

Thorax black, densely grey pollinose. Scutum metallic subshining with brownish stripes. Acrostichals setulose in two rows, intra-alars 1+2 (often weak).

Legs. Femora and tibia black, except yellow bases of tibiae, densely greyish dusted; tarsi of all legs yellowish, tarsomeres 4 and 5 darkened.

Abdomen black with greenish tinge, golden-grey pollinose, subshining. Tergite 5 approximately equal in length to tergite 4. Male genitalia small, as long as tergite 5. Epandrium elongate in dorsal (posterior) view ( Fig. 32 ), wider in cercal half; surstylus broad and oval. Epandrium parallel-sided in lateral view ( Fig. 41 ); surstylus is continuation of epandrium, with short median lobe. Aedeagus relatively wide with pointed tip in lateral view ( Fig. 14 ). Gonite with broad basal part and slender pointed tip in lateral view ( Fig. 23 ).

NOTE. The species is easily determined by the following combination of characters: acrostichal setae in two rows and postocular setae short and thin. Additional diagnostic characters may be silvery grey coloration of face and dark femora and tibiae.

DISRTIBUTION. Russia: Amur Oblast, Kamchatka Krai, Karelia, Leningrad Oblast, Nizhegorod Oblast, Yakutia. — Palearctic: Bulgaria, Denmark, Finland, France, Germany, Lithuania, Netherlands, Poland, Romania, Sweden [ Mathis, Zatwarnicki, 1995]; Tadjikistan (first record), Kazakhstan (first record), Mongolia (first record).

Figures

Figs 1–4. Head, lateral view (1, 2) and scutum (3, 4) of Ephydra spp.: 1, 3 — E. glauca Meigen; 2 — E. sholtzi Becker; 4 — E. riparia Fallén. Рис. 1–4. Голова, сбоку (1, 2) и среднеспинка (3, 4) Ephydra spp.: 1, 3 — E. glauca Meigen; 2 — E. sholtzi Becker; 4 — E. riparia Fallén.

Figs 7–15. Aedeagus of Ephydra spp., lateral view: 7 — E. afghanica Dahl; 8 — E. attica Becker; 9 — E. glauca Meigen; 10 — E. japonica Miyagi; 11 — E. macellaria Egger; 12 — E. pseudomurina Krivosheina; 13 — E. riparia Fallén; 14 — E. sholtzi Becker; 15 — E. villosa sp.n. Рис. 7–15. Эдеагус Ephydra spp., сбоку: 7 — E. afghanica Dahl; 8 — E. attica Becker; 9 — E. glauca Meigen; 10 — E. japonica Miyagi; 11 — E. macellaria Egger; 12 — E. pseudomurina Krivosheina; 13 — E. riparia Fallén; 14 — E. sholtzi Becker; 15 — E. villosa sp.n.

Figs 16–24. Gonite of Ephydra spp., lateral view: 16 — E. afghanica Dahl; 17 — E. attica Becker; 18 — E. glauca Meigen; 19 — E. japonica Miyagi; 20 — E. macellaria Egger; 21 — E. pseudomurina Krivosheina; 22 — E. riparia Fallén; 23 — E. sholtzi Becker; 24 — E. villosa sp.n. Рис. 16–24. Гонит Ephydra spp., сбоку: 16 — E. afghanica Dahl; 17 — E. attica Becker; 18 — E. glauca Meigen; 19 — E. japonica Miyagi; 20 — E. macellaria Egger; 21 — E. pseudomurina Krivosheina; 22 — E. riparia Fallén; 23 — E. sholtzi Becker; 24 — E. villosa sp.n.

Figs 31–33. Epandrium and surstyli of Ephydra spp., dorsal view: 31 — E. riparia Fallén; 32 — E. sholtzi Becker; 33 — E. villosa sp.n. Рис. 31–33. Эпандриум и сурстили Ephydra spp., сверху: 31 — E. riparia Fallén; 32 — E. sholtzi Becker; 33 — E. villosa sp.n.

Figs 40–42. Epandrium and surstyli of Ephydra spp., lateral view: 40 — E. riparia Fallén; 41 — E. sholtzi Becker; 42 — E. villosa sp.n. Рис. 40–42. Эпандриум и сурстили Ephydra spp., сбоку: 40 — E. riparia Fallén; 41 — E. sholtzi Becker; 42 — E. villosa sp.n.