Euura lindqvisti ZMUO.

204 Euura lindqvisti (Hellén, 1951) Figs 233, 457 Amauronematus lindqvisti Hellén, 1951b: 107–108. Lectotype designated below. Amauronematus edenticulatus Lindqvist, 1970: 100. Syn. nov. Diagnosis From mostly black to extensively pale (black or extensively pale mesepisternum), brown pterostigma with some pale basally, centrally or anteriorly, “ Amauronematus - type ” head, bifid claws, elongate gradually narrowing valvula 3 without invagination, malar space about 1.4–1.5 times as long as diameter of front ocellus (females). Externally, the most similar species are viduata group, opacipleuris group, darker species of miltonota group, E. berolinensis, and E. nigriventris. Length of malar space and structure of the lancet (with 17–20 serrulae, practically without microdenticles, long setae) distinguish it from the similar species. Males possibly not clearly distinguishable from other aegra group species. Lectotype of lindqvisti GP. 110166: mesepisternum upper half reddish, tegula pale (like holotype edenticulatus from Salix), not reared. A specimen of edenticulatus (non-type) from Irkutsk reared from Betula (GP.110176) has pale tegula but black mesepisternum. Specimen from Finland reared from Betula (GP.110168) has black tegula and black mesepisternum. Among the type series of lindqvisti most specimens have black mesepisternum, but tegula varies continuously from black to pale. All specimens with slightly or extensively pale mesepisternum have pale tegula. Unless two similar species are involved, E. lindqvisti may feed both on Salix and Betula (Tenow 1963). Type material examined Lectotype Amauronematus lindqvisti, here designated FINLAND – Inari Lapland • ♀; Utsjoki, Outakoski; 69.61° N, 25.98° E; 14 Jun. 1947; W. Hellén leg.; MZH, http://id.luomus.fi/GP.110166. Holotype Amauronematus edenticulatus RUSSIA – Irkutskaja oblast • ♀; Irkutsk, Oljhonsk, Popovo; 52.741° N, 106.309° E; 13 Apr. 1968; B.N. Verzhutskij leg.; MZH, http://id.luomus.fi/GL.5129. Host plants Mainly Betula spp., including B. nana and B. pubescens, but apparently also Salix spp. (Tenow 1963; holotype of edenticulatus). Genetics COI Based on 7 specimens, maximum within-species distance is 2.13% and the nearest neighbour, diverging by a minimum of 0%, is Euura aegra. Nuclear Based on 5 specimens, maximum within-species distance is 0.29% (0.41% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.18%, is Euura hebes. Distribution and material examined Palaearctic. Specimens studied are from Finland, Russia, and Sweden.