Cupressatia siskiyou (Felt, 1917)

Fjellberg, Arne & Fedotova, Zoya, 2024, New records of gall midges (Diptera, Cecidomyiidae) from Norway, Norwegian Journal of Entomology 71, pp. 8-94 : 55

* Cupressatia siskiyou (Felt, 1917)

( Figure 33 )

Material: AK, Oslo: Blindern , 59.940034°N 10.716814°E ± 10m, 10 October 2019, LMF, leg . HE, BOLD: NHMO-ENT-548225, coll. NHMO; Brattlikollen, Steingrims vei, 59.883526°N 10.802032°E ± 5m, 9 April 2020, LMF, leg . HE, coll. NHMO.

Biology and notes: The yellowish to orange larvae develop in cones of Chamaecyparis lawsoniana ( Cupressaceae ). Infected cones become somewhat disfigured and tend to stay greenish and closed throughout the winter. Each larva develops in a small depression on a seed. It hibernates in the cone in a white silk cocoon and pupates there in the spring. Univoltine. Descriptions of the species are provided in de Meijere (1935), Stelter (1988b) and Gagné (2013).

Distribution: Native to the Nearctic but introduced to Europe. Known from several European countries including Norway and Denmark. The first European record was made in the Netherlands in 1931 ( de Meijere 1935).

Figures

FIGURE 33. Cupressatia siskiyou. This is an alien species in our fauna. A. Galled cone (middle) on Chamaecyparis lawsoniana. B. Seed with larva. C. Male. D. Female. Photos: H. Elven.