Semudobia tarda Roskam, 1977

Fjellberg, Arne & Fedotova, Zoya, 2024, New records of gall midges (Diptera, Cecidomyiidae) from Norway, Norwegian Journal of Entomology 71, pp. 8-94 : 88-89

* Semudobia tarda Roskam, 1977

( Figure 57 C–E )

Material: AK, Oslo: Ellingsrud, Munkebekken , 59.931515°N 10.913550°E ± 20m, 23 February 2021, Betula pendula, MF , leg . HE, coll. NHMO.

Biology: The orange larvae develop individually in seeds of Betula pendula and B. pubescens ( Betulaceae ).Infectedseedsareswollen,somewhat

glabrous, have strongly reduced or missing wings, and have a small, round, thin-walled “window” on one side, from which the midge will emerge. Univoltine. The larva hibernates in the gall and pupates there in the spring.

Distribution: Widespread Palearctic, including Norway and Denmark. Introduced to the Nearctic.

Figures

FIGURE 57. Semudobia spp. The members of this genus develop in the catkins of Betula spp. A. Semudobia betulae. Galled seeds of Betula pendula. B. Semudobia skuhravae. Galled catkin scales of Betula pendula. C–E. Semudobia tarda. C. Galled seeds of Betula pendula. D. Male. E. Female. Photos: H. Elven.