Euura dorsata PR.

153 Euura dorsata (Cameron, 1875) Figs 151, 385 Nematus dorsatus Cameron, 1875: 129–130. Syntypes ♀♀ (BMNH?), not examined. Type locality: United Kingdom, Scotland, Inverness-shire, Rannoch, and Bishopton. Diagnosis Nearly completely pale, and thus resembling most specimens of E. flavescens, at least some E. latibasis, and E. seriepunctata. Serrulae of the lancet of E. dorsata are more protruding than in E. flavescens and E. seriepunctata. Euura latibasis might have a shorter lamnium compared to radix (lamnium 1.8–1.9 times as long as radix in E. latibasis, about 2.0–2.4 times as long in E. dorsata). Euura fuscarima of the E. bipartita group is also similar externally and has a similar lancet. The middle and apical sutures of the lancet of E. fuscarima are perhaps straighter than in E. dorsata. Host plants Betula pubescens including ssp. czerepanovii (N.I.Orlova) Hämet-Ahti. Genetics COI Based on 2 specimens, maximum within-species distance is 0.31% and the nearest neighbour, diverging by a minimum of 1.67%, is Euura latibasis. Nuclear Based on 2 specimens, maximum within-species distance is 0% (0.03% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 2.4%, is Euura reticulata. Distribution and material examined Palaearctic. Specimens studied are from Finland, and Sweden.