Ephydra villosa, Krivosheina & Ozerov, 2021

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 : 358-359

KEY TO SPECIES OF THE GENUS EPHYDRA OF RUSSIA

1. Anterior acrostichal setae in two distinct rows (e.g., Fig. 3 ); tarsal claws generally nearly as long as tarsomere 5; male aedeagus nearly straight, lacking recurved basal process (e.g., Fig. 9 ) (The glauca group) ................... 2

– Anterior acrostichal setae in many irregular rows (e.g., Fig. 4 ); tarsal claws generally no more than half of tarsomere 5; male aedeagus with strongly recurved basal process (e.g., Fig. 8 ) (The riparia group) .................... 3

2. Postocular setae short and thin ( Fig. 2 ). Surstylus in dorsal view elongate-oval ( Fig. 32 ), in lateral view as in Fig. 41 . Aedeagus ( Fig. 14 ). Gonite ( Fig. 23 ) ............... .......................................................... E. scholtzi Becker

– Postocular setae strong, well developed ( Fig. 1 ) ............ 4

3. Body densely grey pollinose, upper face, scutum and abdomen not subshining, 1+2 intra-alar setae present. Surstylus in dorsal view wide basally and thin apically ( Fig. 27 ), in lateral view as in Fig. 36 . Aedeagus ( Fig. 9 ). Gonite ( Fig. 18 ) ................................ E. glauca Meigen

– Body golden-grey pollinose, upper face, scutum and abdomen subshining, 2+2 intra-alar setae present. Surstylus in dorsal view curved and covered with many setae ( Fig. 33 ), in lateral view as in Fig. 42 . Aedeagus ( Fig. 15 ). Gonite ( Fig. 24 ) ...................................... E. villosa sp.n.

4. Tergite 5 of male 2 times or more as long as tergite 4 ....... 5

– Tergite 5 of male 1.3–1.7 times but no more than 2 times as long as tergite 4 ........................................................ 7

5. Legs yellow. Surstylus in dorsal view very thin and curved ( Fig. 25 ), in lateral view as in Fig. 34 . Aedeagus ( Fig. 7 ). Gonite ( Fig. 16 ) ............................... E. afghanica Dahl

– Femora black or yellow, grey dusted .............................. 6

6. Anterior interfrontal seta 1/2 as long as ocellar. Abdomen unicolor. Surstylus in dorsal view widened apically ( Fig. 31 ), in lateral view pointed apically ( Fig. 40 ). Aedeagus ( Fig. 13 ). Gonite ( Fig. 22 ) ........................... ............................................................ E. riparia Fallén

– Anterior interfrontal seta 1/3 as long as ocellar. Male abdominal tergite 5 often golden, contrasting to grey coloration of other tergites. Surstylus in dorsal view straight and not widened ( Fig. 28 ), in lateral view broadly rounded and curved ( Fig. 37 ). Aedeagus ( Fig. 10 ). Gonite ( Fig. 19 ) ............................. E. japonica Miyagi

7. Palpus yellow-grey to dark grey. Tergite 5 of male 1.3– 1.5 as long as tergite 4. Surstylus in dorsal view thin and straight, not covered with long setae ( Fig. 29 ), in lateral view as in Fig. 38 . Aedeagus ( Fig. 11 ). Gonite ( Fig. 20 ) ....................................................... E. macellaria Egger

– Palpus yellow. Tergite 5 of male 1.5–2.0 as long as tergite 4 .................................................................................... 8

8. Femora yellow, greyish dusted, or yellow. Surstylus in dorsal view broad and rounded apically, covered with short setae ( Fig. 30 ), in lateral view asymmetrical with median lobe ( Fig. 39 ). Aedeagus ( Fig. 12 ). Gonite ( Fig. 21 ) ................................. E. pseudomurina Krivosheina

– Femora yellow or black, grey dusted. Surstylus in dorsal view thin, parallel, widened at the most apex, covered with long setae ( Fig. 26 ), in lateral view broad, symmetrical, pointed at apex ( Fig. 35 ). Aedeagus ( Fig. 8 ). Gonite ( Fig. 17 ) ........................................ E. attica Becker

Acknowledgements. We are very grateful to Dr. Olga Ovchinnikova and Mrs. Galina Suleymanova for the help during our work in ZISP with the material of Ephydra . We also thank Mr.Dmitry Gavryushin for valuable comments and text editing.

The investigation was fulfilled within the State project of the Institute of Ecology and Evolution, Russian Academy of Sciences (M.G. Krivosheina) and within the framework of the State project No 121032300105-0 of Lomonosov Moscow State University (A.L. Ozerov) .

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 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.

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.