Giraudiella inclusa (Frauenfeld, 1862)

Fjellberg, Arne & Fedotova, Zoya, 2024, New records of gall midges (Diptera, Cecidomyiidae) from Norway, Norwegian Journal of Entomology 71, pp. 8-94 : 68

* Giraudiella inclusa (Frauenfeld, 1862)

( Figure 38 )

Material: VE, Larvik: Rakke , 58.97805°N 10.02280°E ± 50m, 15 December 2019, L, leg. AF , coll. NHMO; Faerder: Kjøye , 59.08710°N 10.39844°E ± 50m, 23 December 2019, L, leg. AF , coll. NHMO; AK , Asker: Saetrepollen , N of Grytnes, 59.678368°N 10.538581°E ± 50m, 31 October 2020, MF, leg. TS , coll. NHMO; Brønnøya, Sandbukta , 59.857333°N 10.528840°E ± 30m, 2 April 2019, F, leg. HE , coll. NHMO; Oslo: Frogner, Frognerkilen , 59.916498°N 10.689375°E ± 250m, 19 January 2020, LMF, leg. KB, coll. NHMO ; Bogstadvannet , 59.967062°N 10.636685°E ± 30m, 2 February 2020, MF, leg. KB, coll. NHMO .

Biology and notes: The beige-white to pinkish larvae develop in stems of Phragmites australis ( Poaceae ). Each larva develops in a gall the size and shape of a rice grain fastened to the inner wall of the stem. It pupates in the gall and emerges through a small slit in the wall of the stem. Bivoltine. We have collected galls from late autumn to late spring and have several times hatched adults in the spring from overwintered galls.

Distribution: Widespread in Europe including Norway, Sweden, Denmark and Finland. North Africa and Asia as far east as China. Introduced to the USA.

Figures

FIGURE 38. Giraudiella inclusa. A. Stem of Phragmites australis, with a slit-like opening revealing the existence of a gall within. B. Larva in opened gall. C. Male. D. Female. Photos: H. Elven (A, C, D), T. Starholm (B).