Semudobia skuhravae 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

Semudobia skuhravae Roskam, 1977

( Figure 57 B )

Material: AK, Oslo: Ellingsrud, Munkebekken , 59.931515°N 10.913550°E ± 20m, 14 March 2019, L, leg . HE, coll. NHMO; 23 February 2021, MF, leg . HE, coll. NHMO.

Biology: The orange larvae develop in female catkins of Betula pendula and B. pubescens ( Betulaceae ). Our records are from B. pendula . Each larva develops in an oval gall at the base of a catkin scale, fusing the scale to the stalk of the catkin. The corresponding seed becomes stunted. Univoltine. The larva hibernates in the gall and pupates there in the spring.

Distribution: Widespread Holarctic, including Norway and Denmark.

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.