Ephydra japonica, Miyagi, 1966

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 : 352

Ephydra japonica Miyagi, 1966

Figs 10 , 19 , 28 , 37 .

japonica Miyagi 1966: 137 ( Ephydra ). Type-locality: Hokkaido: Sapporo ( Japan) .

MATERIAL. Primorsky Krai: Kedrovaya Pad’ Nature Reserve (43.104ºN 131.512ºE), 26. VI .1940 , A. Monchadskiy (1 ♂, ZISP); same place, 25. VIII .1980 , A. Shatalkin (2 ♂♂, ZMUM); 40 km SO of Ussuriysk (43.634ºN 132.222ºE), 30.VII.1983, 6.VIII. 1983, A. Ozerov (2 ♂♂, ZMUM); Melkovodnoe (42.861ºN 133. 618ºE), A. Ozerov (9 ♂♂, ZMUM); Posiet (42.67ºN 130.82ºE), seashore, 25 – 30. VI . and 31.VII.2014 , N. Vikhrev (3 ♂♂, ZMUM); Andreevka (42.7ºN 131.1ºE), 25–30. VI .2014 , N. Vikhrev (1 ♂, ZMUM).

DESCRIPTION. Head golden-grey or bluish-grey pollinose except metallic shining frontal vitta and upper face, with bluish-greenish tinge; fronto-orbital plate grey or brownish pollinose. 3–4 long fronto-orbital setae, anterior interfrontal setae thin and short, no more than 1/3 of ocellar. Postocular setae thin and short. Palpus yellow basally and darkened apically. Antenna blackish, brownish dusted; arista short pubescent on dorsal surface on basal ½ or a little more. Gena grey dusted, parafacial golden.

Thorax black, densely brown pollinose. Scutum dark subshining with brownish stripes. Acrostichals setulose in many irregular rows, intra-alars absent.

Legs. Femora black or yellowish, grey dusted, tibia and tarsi of all legs yellowish, darkened dorsally.

Abdomen black, grey pollinose, subshining with greenish tinge. Tergite 5 golden in some specimens, 2 times as long as tergite 4. Male genitalia large, as long as tergites 4+5. Epandrium round-oval in dorsal (posterior) view ( Fig. 28 ), surstyli straight and not widened at apex, parallel apically. Epandrium of one width in lateral view ( Fig. 37 ); surstylus broad, narrowed but not pointed, round and curved apically. Aedeagus with round tip in lateral view ( Fig. 10 ). Gonite with curved narrow tip in lateral view ( Fig. 19 ).

NOTE. The species is close to E. riparia , differing from it in the shape of surstyli, which are not widened apically in dorsal view, and in rounded apex of surstyli in lateral view. Besides, the abdominal tergite 5 of male is golden, contrasting to grey-greenish coloration of other tergites. Our figures of surstyli are made from strictly dorsal position. Turned a little laterally one can see position given by Wirth [1975].

DISRTIBUTION. Russia: Primorsky Krai. — Palearctic: China, Japan (Hokkaido), Korea (South); Oriental: Japan (Ryukyu Islands, Bonin Islands) [ Wirth, 1975].

Figures

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 25–30. Epandrium and surstyli of Ephydra spp., dorsal view: 25 — E. afghanica Dahl; 26 — E. attica Becker; 27 — E. glauca Meigen; 28 — E. japonica Miyagi; 29 — E. macellaria Egger; 30 — E. pseudomurina Krivosheina. Рис. 25–30. Эпандриум и сурстили Ephydra spp., сверху: 25 — E. afghanica Dahl; 26 — E. attica Becker; 27 — E. glauca Meigen; 28 — E. japonica Miyagi; 29 — E. macellaria Egger; 30 — E. pseudomurina Krivosheina.

Figs 34–39. Epandrium and surstyli of Ephydra spp., lateral view: 34 — E. afghanica Dahl; 35 — E. attica Becker; 36 — E. glauca Meigen; 37 — E. japonica Miyagi; 38 — E. macellaria Egger; 39 — E. pseudomurina Krivosheina. Рис. 34–39. Эпандриум и сурстили Ephydra spp., сбоку: 34 — E. afghanica Dahl; 35 — E. attica Becker; 36 — E. glauca Meigen; 37 — E. japonica Miyagi; 38 — E. macellaria Egger; 39 — E. pseudomurina Krivosheina.