Euura leionota

117 Euura leionota (Benson, 1933) Fig. 112 Pteronidea leionota Benson, 1933: 259–260. Pteronidea microserrata Lindqvist, 1941a: 68–69. Syn. nov. Pteronidea nigrita Lindqvist, 1958: 113–114. Secondary homonym of Nematus nigritus Norton, 1861 (incertae sedis). Syn. nov. Pteronidea clavicercus Lindqvist, 1958: 92–94. Syn. nov. Pteronidea verticalis Lindqvist, 1958: 94. Syn. nov. Nematus amaurus Vikberg, 1982. Replacement name for Pteronidea nigrita Lindqvist, 1958. Diagnosis Most similar to E. connecta: see differences mentioned under that species. Female 5.0–7.0 mm. Head extensively to mostly pale; labrum, clypeus and supraclypeal area pale; flagellum black or ventrally pale; thorax dorsally extensively pale (sometimes black?), ventrally extensively or nearly completely pale; pterostigma uniformly pale, brown, or with dark margins; abdomen dorsally mostly black, ventrally completely pale; metafemur and metatibia pale; hind tarsus pale or brown; mesepisternum smooth; claws bifid; valvula 3 in dorsal view with blunt tip. Male Not known for certain. Type material examined Holotype Pteronidea leionota UNITED KINGDOM – England • ♀; Devon, Great Haldons; 50.63° N, 3.57° W; Apr. 1926; R.C.L. Perkins leg.; BMNH, B.M.TYPEHYM.1.634. Notes 22 serrulae. Holotype Pteronidea microserrata FINLAND – Uusimaa • ♀; Kirkkonummi; 60.126° N, 24.439° E; R. Frey leg.; MZH, http://id.luomus. fi/GL.9221. Notes 21 serrulae. Holotype Pteronidea nigrita SWEDEN – Torne Lappmark • ♀; Abisko; 68.35° N, 18.83° E; 25–30 Jun. 1954; J.E. and R.B. Benson leg.; BMNH, B.M.TYPEHYM.1.784. Notes 20–21 serrulae; 6 mm. Holotype Pteronidea clavicercus FINLAND – Häme • ♀; Pirkkala; 61.466° N, 23.642° E; 13 Jun. 1935; T. Grönblom leg.; MZH, PR.558VV. Notes 21 serrulae. Best morphological match: DEI-GISHym12042 (22 serrulae). Holotype Pteronidea verticalis FINLAND – Satakunta • ♀; Björneborg [Pori]; 61.49° N, 21.81° E; 17 May 1935; E. Lindqvist leg.; MZH, PR.557VV. Notes 23 serrulae. Best morphological match: DEI-GISHym12042 (22 serrulae). Host plants Betula pendula Roth and B. pubescens. Genetics COI Based on 7 specimens, maximum within-species distance is 0.31% and the nearest neighbour, diverging by a minimum of 1.37%, is Euura sordidiapex. Nuclear Based on 6 specimens, maximum within-species distance is 0.16% (0.14% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.31%, is Euura leucopyga. Distribution and material examined Palaearctic. Specimens studied are from Finland, Norway, Slovakia, Sweden, and the United Kingdom.