Gardenforsia oelandica, Jaschhof & Jaschhof, 2019

Jaschhof, Mathias & Jaschhof, Catrin, 2019, New Dicerurini from Europe, mostly Sweden (Diptera: Cecidomyiidae, Porricondylinae), Zootaxa 4559 (2), pp. 245-264 : 262-263

Gardenforsia oelandica sp. nov.

Figs 9–11

Diagnosis. As the only species described of Gardenforsia , G. oelandica can be recognized by the characters specified in the generic diagnosis.

Other male characters. Body size 1.7 mm. Head. Scape and pedicel concolorous with flagellum. Neck and node of fourth flagellomere equally long ( Fig. 11 ). Thorax. Anepisternum asetose. Wing. 3.0 times longer than wide. Setae on central and basal portions of membrane very sparse. Legs. Claws toothless. Empodia broad, as long as claws ( Fig. 10 ). Genitalia ( Fig. 9 ). Ninth tergite with two lateral groups of setae; posterior edge slightly emarginated medially. Gonocoxae: ventral setae largely confined to lateral portions; ventral bridge short; emargination deep, broadly U-shaped, reinforced by sclerotization all-around; gonocoxal processes absent; dorsal apodemes with long anterior processes. Gonostylus slightly convex, with broad, rounded lobe ventrally; exterior surface with large setae of various lengths, interior setae shorter and finer except 2–3 longer bristles. Ejaculatory apodeme thin, clearly longer than tegmen.

Etymology. The species name refers to Öland, the Baltic island off Sweden’s southeast coast, where the types of this species were collected.

Type material. Holotype. Male , Sweden, Öland , Mörbylånga, Stora Dalby Forest Nature Reserve, mixed broadleaf forest with abundant dead ash trees, 8 June–8 July 2015, Malaise trap, M. & C. Jaschhof (spm. no. CEC 1595 in NHRS). Paratypes. 1 male (lacking the head), Mörbylånga, Skogsby, Station Linné, swampy meadow surrounded by willow scrub, 2 June–4 July 2016, MT, MCJ & E. Gustavsson (spm. no. CEC 1596 in NHRS) ; 1 male, Öland, Borgholm, Rönnerum-Abbantorp NR, small bushy fen in mixed broadleaf forest, 17 June– 15 July 2015, MT, MCJ (spm. no. CEC 1597 in SDEI) ; 1 male, same data but 16 July–21 August 2015 (spm. no. CEC 1598 in SDEI) .

Figures

FIGURES 5–11. Linnaeomyia hortensis, male, holotype. 5: Gonocoxa, dorsal. Linnaeomyia pratensis, holotype, male. 6: Genitalia, ventral. 7: Fourth flagellomere, lateral. 8: Tegmen, ventral. Gardenforsia oelandica, male, holotype. 9: Genitalia, ventral. 10: Foredistitarsus, ventrolateral. 11: Fourth flagellomere, dorsolateral. Scales for 5–9, 11, 0.05 mm, for 10, 0.025 mm. Arrows refer to characters described in the diagnosis.