Anisostephus betulinus (Kieffer, 1889)

(Figure 15)

Material: NSY, Meløy: Reipå, Fore, 66.903695°N 13.558062°E ± 600m, 20 July 2020, L, leg. HE, coll. NHMO; 7 July 2021, LMF, leg. HE, coll. NHMO; Gildeskål: Laksådalen, 66.944671°N 13.943290°E ± 20m, 25 July 2022, L, leg. HE, coll. NHMO; Inndyr, Høgfjelldalen, 67.046253°N 14.066552°E ± 100m, 21 July 2019, L, leg. HE, coll. NHMO; Gildeskål kirke, 67.059196°N 14.040487°E ± 200m, 16 July 2022, LI, leg. HE, coll. NHMO; Sund, Sundsvannet, 67.060049°N 14.066206°E ± 5m, 20 July 2019, L, leg. HE, coll. NHMO; Sund, Sundsfjellet, 67.060698°N 14.071423°E ± 3m, 18 July 2020, L, leg. HE, coll. NHMO; Breivika, Breivikdalen, 66.998670°N 14.245940°E ± 5m, 22 July 2020, L, leg. HE, coll. NHMO.

Biology: The white to yellow larvae cause round, parenchymal galls on leaves of Betula pendula and B. pubescens ( Betulaceae). Our records are all from Betula pubescens . The galls are usually light green and ringed by red. Univoltine; pupation and hibernation in the soil. The species is redescribed in Askew & Ruse (1974).

Distribution: Widespread Palearctic. Widespread in Europe including Norway, Sweden, Denmark and Finland.