<i>Sylvenomyia</i> gen. n. in Sweden and a key to the genera of the tribe Winnertziini (Diptera: Cecidomyiidae, Porricondylinae)

Abstract

A new porricondyline genus, Sylvenomyia, is described. Another new porricondyline genus, Cryptoxylomyia, is erected for a species previously referred to genus Rhipidoxylomyia Mamaev.

On the systematics of Sylvenomyia Mamaev &amp; Zaitzev (Diptera, Cecidomyiidae, “Porricondylinae”), with the description of a new species from Finland

“…nov. (Fig. 1B, C Supplement to the descriptions by Spungis (1985) and Mamaev & Zaitzev (1998). Body size 1.1-1.3 mm.…”

“…Mamaev & Zaitzev 1998: 211. Type species: Sylvenomyia sueciae Mamaev & Zaitzev 1998[= Chastomera spinigera Spungis 1985.…”

“…Systematic position. Mamaev and Zaitzev (1998) classified Sylvenomyia with the Winnertziini, a decision presumably influenced by the wing venation, the presence in males of less than 14 flagellomeres, and the simple, hair-shaped antennal sensilla. On first sight, this classification seems plausible and supported by further features, such as the absence of pleurothoracal setae and the Winnertzia-like male terminalia, i.e.…”

“…The genus Sylvenomyia was introduced by Mamaev and Zaitzev (1998) for Sylvenomyia sueciae, a new species based on two male specimens collected in south Sweden. Mamaev and Zaitzev did not convey which of the features of Sylvenomyia they considered diagnostic and why they assigned this genus to the tribe Winnertziini.…”

“…Their key to the genera of Winnertziini employs characters of the female, which for Sylvenomyia are unknown, and suggests Sylvenomyia males have 12 antennal flagellomeres, whereas we found they have 11. Apart from these shortcomings the original description includes the figure of a wing (Mamaev & Zaitzev 1998: fig. 1b), which, even though not correct with respect to some details, eventually set us on the right track in clarifying the identity of Sylvenomyia sueciae.…”