Psacadina, Enderlein, 1939

Vikhrev, Nikita E., 2022, Notes on the genus Psacadina (Diptera, Sciomyzidae), Amurian Zoological Journal XIV (4), pp. 562-569 : 566

Identification key for Psacadina ♂ ♀

1. Wing with rounded ( Fig. 2a) or diamondshaped ( Fig. 2b) spots along costal margin; posterior crossvein S-shaped. (Body length ♂ ♀: 5.6–6.6 mm; Transpalaearctic.) ♂: sternite 5 narrow, elongat- ed, with curved posteriorly apices as in Fig. 11 . (Surstyli ear-shaped as in Fig. 10 .)............................ zernyi Mayer

— Wing with inverted trapezoid ( Fig. 3b) or subquadrate ( Fig. 3a) spots along costal margin; posterior crossvein not S-shaped, only with a fold at middle. ♂: sternite 5 not as above, surstyli not ear-shaped........ 2

2. Body length ♂ ♀: 5.2–6.2 mm. European, also recorded in Turkey and N Kazakhstan, uncommon in the eastern part of its range. ♂: sternite 5 as in Fig. 12 (half moon shaped, with rounded projection on posterior margin and a notch on anterior margin).................... vittigera Schiner

— Body length ♂ ♀: 3.8–4.8 mm. East Palaearctic eastern of 90°E. Common in south-eastern Siberia and Mongolia, uncommon in the Far East. ♂: sternite 5 as in Fig. 13 (with notch on posterior margin and long projection on anterior margin).......................... kaszabi Elberg

Figures

Figs. 11–13. Sternite 5 of Psacadina, posterior margin above, anterior below: 11 — P. zernyi; 12 — P. vittigera; 13 — P. kaszabi Рис. 11–13. Стернит 5 Psacadina, заΑний край обращен кверху, переΑний книзу: 11 — P. zernyi; 12 — P. vittigera; 13 — P. kaszabi

Figs. 7–10. Surstylus of Psacadina: 7, 8 — the same surstylus of P. vittigera from a different angle of view; 9 — P. kaszabi; 10 — P. zernyi Рис. 7–10. СурстиΛи Psacadina: 7, 8 — оΑин и тот же сурстиΛь P. vittigera при съемке с разных угΛов зрения; 9 — P. kaszabi; 10 — P. zernyi