Hydrotaea parva Meade, 1889

Vikhrev, Nikita E., Esin, Mikhail N., Yanbulat, Maria O. & Ruchin, Alexandr B., 2020, A list of the Sciomyzidae, Fanniidae and Muscidae (Diptera) of Mordovia, Amurian Zoological Journal XII (4), pp. 444-459 : 452-453

25. Hydrotaea parva Meade, 1889

Pushta vill. env., 54.71°N 43.22°E, horse dung: 6–12 June 2020, N. Vikhrev, 3♂; 1–5 September 2020, N. Vikhrev, 1♂.

26. Hydrotaea pellucens Porchinskiy, 1879 Inorskoe Lake , 54.728°N 43.15°E, on carrion, 20 May 2020, N. Vikhrev, 1♂, M. Esin, 1♂; Pushta vill. env., 54.71°N 43.22°E, on carrion, 6–12 June 2020, N. Vikhrev, 1♂, 4♀.

REMARKS. An interesting finding. H. pellucens is a European species originally described from Belarus, vicinity of Mogilev. The species may be reliably identified by males while identification of females is more doubtful as discussed above in remarks to H. borussica and in ( Vikhrev 2013).

In main Russian entomological collections males of H. pellucens are represented by two series: the first series are the specimens from NW of European Russia (in Zoological Institute, Saint Petersburg) and the other series are specimens recently collected in Belarus, Gomel region (Zoological Museum of Moscow University), see Makovetskaya & Vikhrev (2020). According to hitherto known records, H. pellucens did not extend beyond 31°E, so the Mordovian record moves the known eastern distributional limit by almost 1000 km.

There are several records of H. pellucens from Ural and W Siberia ( Sorokina, Pont 2010) based on Russian regional publications in which this species was identified by females. We believe that these records most probably are misidentifications of H. borussica which extends far in Siberia till at least 93°E.