Winnertzia longiptera Mamaev

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 : 37-38

Winnertzia longiptera Mamaev

Diagnosis. A small to medium-sized, brown Winnertzia with conspicuously long wings. A combination of male genitalic characters is diagnostic of this species, as follows ( Jaschhof & Jaschhof 2013: fig. 39A–B). The gonostylus, which is parallel-sided and more than twice as long as broad, has a broad pectinate claw with a furrow along its base. The gonocoxal synsclerite, whose base is markedly narrowed, has the lateral edges conspicuously straight (as opposed to convex); the deep, V-shaped ventral emargination is accompanied by a small membranous area basally; the medial bridges are conspicuously densely setose; and the dorsal apodemes are thin and moderately long. The large, subtriangular tegmen has a narrowly rounded apex; the lateral edges are sharply contoured except for a short, subapical break; the flaps are indistinct; and the parameral apodemes are large. The ninth tergite is conspicuously narrow posteriorly.

To distinguish W. longiptera from generally similar species (see the discussion below), the following characters should be considered: pronotal setae number 7–11, the nodes of the flagellomeres are conspicuously narrow, the empodia are only half as long as the claws, and the aedeagal apodeme is parallel-sided except for the apex which is constricted for a short distance.

Discussion. We know of seven other species in Sweden sharing with W. longiptera the large gonostylus with a broad pectinate claw, and the ninth tergite with a narrow, slightly concave posterior margin. Two of these were described in our earlier revision of Winnertzia as species A and C ( Jaschhof & Jaschhof 2013: 98 and 100, respectively), the others were discovered in the course of the present study. It is basically possible to distinguish longiptera -like species from each other using male morphological indicators (as shown for species A and C in our 2013 paper), although the characters we found to be useful for identification went mostly unregarded by previous taxonomists. As a consequence, our species diagnoses are not comparable with those published earlier. We leave it, therefore, unclarified for the time being whether these species are new to science or hidden as unrecognizables in the literature (such as W. equestris Mamaev ( Mamaev 1963: fig. 3.6; Spungis 1992: fig. 60)). For now they are labeled as “ longiptera A ” (of which we have seen 18 males), “ longiptera B ” (n = 12), “ longiptera C ” (n = 20), “ longiptera D ” (n = 4), “ longiptera E ” (n = 20), “ longiptera F ” (n = 7), and “ longiptera G ” (n = 5).

Distribution in Sweden. According to our data based on 31 specimens, the range of W. longiptera is confined to the southern half of Sweden (Halland to Dalarna).

Material studied. Specimens of W. longiptera listed by Jaschhof & Jaschhof (2013) and as follows. Sweden: 2 males, Småland, Nybro, Bäckebo , Grytsjön NR, mixed boreal forest, 17 June–16 July 2015, MT, MCJ (spns CEC2829 – CEC2830 ) ; 1 male, Öland, Borgholm , S Trollskogen NR, commercial pine forest, 5 July 2014, sweepnet, MCJ (spn CEC2810 ) ; 1 male, Borgholm, Skepparsäng NR, dry pine forest, 11 June–21 July 2015, MT, MCJ (spn CEC2813 ) ; 1 male, Öland, Mörbylånga, Färjestaden , backyard with birch grove, 10 June–10 July 2015, MT, MCJ (spn CEC2811 ) ; 1 male, Mörbylånga, Skogsby, Station Linné , backyard with compost pile, 26 June–7 July 2015, MT, MCJ (spn CEC2812 ) ; 5 males, Halland, Laholm, Blåalt NR, oak-dominated forest, 12 June–8 July 2019, MT , M. Lindström (spns CEC2817 – CEC2821 ); 1 male, Dalarna, Orsa, Gåsberget NR, swampy mixed boreal forest, 25 June–18 July 2018, MT, MCJ (spn CEC2831 ) (all in SDEI) . Species A: spns GULI000021363 – GULI000021374 in NHRS, spns SE1619–SE1621, SE1627, and SE 1633–1634 in SDEI. Species B: spns CEC3218 – CEC 3229 in SDEI. Species C: spns GULI000021389 – GULI000021392 in NHRS, spns SE1541, SE1546–SE1547, and CEC3230 – CEC 3242 in SDEI. Species D: spns GULI000021393 – GULI000021394 in NHRS, spns SE1545 and CEC 4243 in SDEI. Species E: spns GULI000020968 – GULI000020969 and GULI000020975 – GULI000020977 in NHRS, spns CEC3244 – CEC 3258 in SDEI. Species F: spns GULI000020970 – GULI000020974 in NHRS, spns CEC3259 – CEC 3260 in SDEI. Species G: spns CEC3261 – CEC 3265 in SDEI.