Tetraneuromyia wilksae, Jaschhof, Mathias & Jaschhof, Catrin, 2015

Jaschhof, Mathias & Jaschhof, Catrin, 2015, New species and new distribution records of Lestremiinae, Micromyinae and Porricondylinae (Diptera: Cecidomyiidae) in Sweden, Zootaxa 3973 (1), pp. 159-174 : 168-169

Tetraneuromyia wilksae sp. n.

( Fig. 7 A–D)

Diagnosis. Tetraneuromyia wilksae , in every respect a typical representative of the genus Tetraneuromyia ( Jaschhof & Jaschhof 2013) , is close to T. moldaviensis (Spungis) as indicated by male genital morphology. In both these species, gonocoxal processes are greatly developed ( Jaschhof & Jaschhof 2013: fig. 78C; this paper, Fig. 7 C, ↓) and tegmen processes are larger than is average in this genus ( Jaschhof & Jaschhof 2013: fig. 78B; this paper, Fig. 7 D, ↓). As for interspecific differences, there are 2 pairs of long tegmen processes in T. moldaviensis ( Jaschhof & Jaschhof 2013: fig. 78B), but only 1 such pair in T. wilksae (Fig. D, ↓); the gonostylus apex is broadly rounded in T. moldaviensis ( Jaschhof & Jaschhof 2013: fig. 78A), but pointed in T. wilksae (Fig. A, ↓); and the posterior margin of ninth tergite is slightly concave in T. moldaviensis ( Jaschhof & Jaschhof 2013: fig. 78C), but deeply emarginate in T. wilksae (Fig. B, ↓).

Other male characters. Body size 1.4 mm. Head. Eye bridge 1–3 ommatidia long dorsally. Scape and pedicel concolorous with flagellum. Neck of fourth flagellomere 1.8 times longer than node; circumfilum as typical in Tetraneuromyia ( Jaschhof & Jaschhof 2013) . Palpus as long as head height. Thorax. Anepisternum asetose. Wing. 3.0 times longer than wide. M absent. CuA1 faint. Legs. Basitarsi, claws, and empodia as typical in Tetraneuromyia . Tarsi not white-tipped. Terminalia ( Fig. 7 ). Ninth tergite well sclerotized, especially medioposteriorly (Fig. B). Gonocoxal emargination small, U-shaped (Fig. C). Gonostylus bent inwards (Fig. A). Tegmen (Fig. D): only ventral processes greatly developed, pointed, strongly curved ventrally, dorsal processes rudimentary, blunt-ended, directed dorsally. Ejaculatory apodeme very long, with pointed, weakly sclerotized apex (Fig. C).

Etymology. This species is named after Anne Wilks, Ullevi, Öland.

Types. Holotype. Male (CEC74), Sweden, Uppland, Östhammar, Andersby Nature Reserve SW Österbybruk, mixed deciduous / coniferous forest, 10 Sep. 2005, sweepnet & aspirator, M. Jaschhof (in NHRS). Paratype. Male (CEC75), same data as the holotype.

Figures

FIGURE 7. Male genital structures of Tetraneuromyia wilksae. A: Gonostylus, ventral. B: Ninth tergite, dorsal. C: Genitalia, ventral. D: Tegmen, ventral. Scale 0.05 mm.