Euura gracilidentata

269 Euura gracilidentata (Viitasaari, 1980) Figs 214, 506 Pteronidea gracilidentata Viitasaari, 1980: 34–36. Diagnosis The mostly black head (including antenna) and thorax, yellow abdomen (except black first tergite), and small subapical tooth (can be almost absent in male) should usually enable identification of the species. May be a specialist on Ribes alpinum L. Type material examined Holotype Pteronidea gracilidentata FINLAND – Uusimaa • ♀; Helsinge [Vantaa]; 60.30° N, 24.90° E; 1 Jun. 1964; E. Lindqvist leg.; MZH, http://id.luomus.fi/GL.2454. Host plants Ribes alpinum. Genetics COI Based on 2 specimens, maximum within-species distance is 0.3% and the nearest neighbour, diverging by a minimum of 0.46%, is Euura leucotrocha. Nuclear Based on 2 specimens, maximum within-species distance is 0.03% (0.62% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.5%, is Euura leucotrocha. Distribution and material examined Palaearctic. Specimens studied are from Finland, Germany, and Sweden.