Gynapteromyia heteroptera ( Mamaev & Spungis, 1980 ) Mamaev & Spungis, 1980

Jaschhof, Mathias, 2016, A review of world Diallactiini (Diptera, Cecidomyiidae, Winnertziinae), with the description of six new genera and seventeen new species, Zootaxa 4127 (2), pp. 201-244 : 215

Gynapteromyia heteroptera ( Mamaev & Spungis, 1980) comb. nov.

Figs 2 , 4E–F

Chastomera heteroptera —Mamaev & Spungis in Mohrig et al. 1980: 149, fig. 1; Spungis 1985: 41, fig. 1. Haplusia heteroptera — Gagné 1978: 518; Jaschhof & Jaschhof 2013: 61.

This species, originally described in Mohrig et al. (1980) and subsequently by Spungis (1985) and Jaschhof & Jaschhof (2013), is known from a very few specimens found in Lithuania, Latvia, and Sweden. In addition to the only specimen previously known from Sweden, a male from Uppland ( Jaschhof & Jaschhof 2013), four males are reported here from Öland.

Diagnosis. This is the only Gynapteromyia known to have an elongate-trapezoid tegmen without protruding corners apically, gonocoxal apodemes with very short anterior processes, and no ejaculatory apodeme ( Mohrig et al. 1980: fig. 1g; Spungis 1985: fig. 2.3). Female wings may be everything from normally developed to strongly reduced ( Mohrig et al. 1980: fig. 1a). Female microptery is known also from G. carpatica , a species with singlesegmented palpi (compared with 2–3 palpal segments in G. heteroptera ), and might well occur in Gynapteromyia species whose females have not yet been found.

Male characters not mentioned or described otherwise in previous literature. Head. Genal setae 0–1. Palpus with either 2 or 3 segments ( Fig. 4E–F ), sensory hairs on first and second segments. Wing. Vei n b t v unsetose. Setae confined to apical portion of membrane. Length of CuA varying, usually fading out before wing margin. Legs. Distitarsi with sparse setae, conspicuously dense microtrichia.

Material examined. Sweden: 2 males (CEC00135−00136), Öland, Borgholm, Rönnerum-Abbantorp Nature Reserve, mixed deciduous forest with predominantly hornbeam, 17 June–15 July 2015, Malaise trap, M. & C. Jaschhof (in NHRS); 2 males (CEC00137−00138), Borgholm, Lindreservatet Nature Reserve, mixed deciduous forest, 11 June–21 July 2015, Malaise trap, M. & C. Jaschhof (in SDEI).

Figures

FIGURE 2. Male Gynapteromyia heteroptera from Öland, Sweden. Specimen mounted in Canada balsam on microscopic slide, genitalia detached. Scale 0.5 mm.

FIGURE 4 A – F. Gynapteromyia brevipalpis (A – D) and Gynapteromyia heteroptera (E – F), males (Sweden). A: Genitalia, ventral. B: Palpus, lateral. C: Palpus, lateral, variation. D: Fourth flagellomere, lateral. E: Palpus, lateral. F: Palpus, lateral, variation. Scales 0.05 mm.