Coenosia pygmaea Zetterstedt, 1845 Purdoshki

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 : 457-458

132. Coenosia pygmaea Zetterstedt, 1845 Purdoshki env., 54.689°N 43.533°E, 6 September 2020, M. Yanbulat, 1♂.

REMARKS. In Hennig’s (1962, 597–598) redescription of C. pygmaea it is clearly stated that “Fore tarsus yellow with the exception of the two dark segments.” However, from his key to males ( Hennig 1962, 529) it is not obvious that both apical fore tarsomeres are dark. In their key (for ♂ C. pygmaea ) Gregor et al. (2002, 75) use absolutely clear but erroneous wording: “Only last tarsomere of fore leg black”, though in their descriptive notes ( Gregor et al. 2002, 192) they correctly wrote that “two distal tarsomeres of fore tarsi darkened”. The error makes identification of C. pygmaea by Gregor’s key impossible. Males of two closely related species we recorded in Mordovia may be distinguished as follows: — Fore tarsus with two distal tarsomeres abruptly black, three basal tarsomeres yellow. f2 entirely yellow; f3 yellow or slightly darkened at apex.... pygmaea Zetterstedt — Fore tarsus more widely darkened, at least three distal tarsomeres dark, only one or two basal tarsomeres yellow; border be-

tween dark and yellow parts is fuzzy. f2

with dark apical ring, f3 darkened in apical third..................... verralli Collin