Winnertzia parvispina Jaschhof

Jaschhof, Mathias & Jaschhof, Catrin, 2020, Reevaluation of species richness in Winnertzia (Diptera, Cecidomyiidae, Winnertziinae), with descriptions of 37 new species from Sweden, Peru and Australia, Zootaxa 4829 (1), pp. 1-72 : 40

Winnertzia parvispina Jaschhof

Diagnosis. A medium-sized, brown Winnertzia with distinctive male genitalia, as follows ( Jaschhof & Jaschhof 2013: fig. 41B–C). The parallel-sided, markedly bent gonostylus has a conspicuously small claw, which consists of only 4–6 widely spaced, subtriangular spines. We are not aware of another Winnertzia with this kind of gonostylar claw. Of the gonocoxal synsclerite, which is massive in relation to the gonostylar size, the ventral emargination is an unusually deep, narrow U-shape, accompanied basally by a small membranous area; and the dorsal transverse bridge, which is conspicuously straight (as opposed to concave, the outline usually found in Winnertzia ), is twice as broad as the dorsal apodeme length. The posterior edge of the ninth tergite, which is markedly narrowed, has a perfectly sinuous outline.

Distribution in Sweden. All the 19 males we have studied of W. parvispina come from the southern quarter of Sweden, with Östergötland as the northernmost distribution.

Material studied. Specimens listed by Jaschhof & Jaschhof (2013) and as follows. Sweden: 1 male, Småland, Nybro, Bäckebo, Grytsjön NR, old-growth aspen forest, 2–12 July 2005, MT, SMTP (trap 1000, collection event 1323) (spn CEC2878 ) ; 2 males, same locality but mixed boreal forest, 17 June–16 July 2015, MT, MCJ (spns CEC2877 and CEC2879 ) ; 1 male, Öland, Mörbylånga, Kalkstad NR, mixed broadleaf forest, 28 August–24 September 2014, MT, MCJ (spn CEC2875 ) ; 1 male, Mörbylånga, Ullevi, herb-rich meadow, 24 May–13 June 2015, MT, MCJ (spn CEC2876 ) (all in SDEI).