Euura tenuis

229 Euura tenuis (Schmidt, 1997) Figs 248, 469 Amauronematus tenuis Schmidt, 1997: 295–296. Diagnosis Most similar to E. striata and E. septentrionalis. Its usually dark brown or dark grey pterostigma and usually small size (5.5–8.0(8.8) mm) helps to recognize the species. Euura tenuis is genetically very close to E. striata and considering the similarly weak morphological differences between them, conspecificity cannot be excluded. Lamnium 1.8–1.9 times as long as radix (ZMUO.046512, holotype). Type material examined Holotype Amauronematus tenuis FINLAND – Inari Lapland • ♀; Kevo; 69.76° N, 27.01° E; 7 Jul. 1989; S. Schmidt leg.; MZH, http://id.luomus.fi/GL.3370. Host plants Salix glauca, S. lapponum, and possibly S. lanata (Schmidt 1997). Genetics COI Based on 9 specimens, maximum within-species distance is 0.91% and the nearest neighbours, diverging by a minimum of 0%, are Euura amicula, E. betulae, E. histrio, E. nuorbinjargi, E. rufa, E. septentrionalis, E. striata, and E. tota. Nuclear Based on 9 specimens, maximum within-species distance is 0.48% (1.19% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0%, is Euura striata (DEIGISHym31412). See notes under Euura striata. Distribution and material examined Palaearctic. Specimens studied are from Finland, and Norway.