Euura quieta ZMUO.

271 Euura quieta (Eversmann, 1847) Figs 216, 508 Nematus quietus Eversmann, 1847: 17. Lectotype designated below. Nematus olfaciens Benson, 1953: 60–63. Syn. nov. Diagnosis Most similar to E. gracilidentata, E. leucotrocha, and E. similator. Generally, head and thorax are darker (usually mostly black) than in E. leucotrocha. In the palest females, mainly black are mesoscutum dorsally and mesepisternum ventrally, while antenna (black or slightly pale ventrally) and head (usually only somewhat brown around the eyes) are still darker than in similarly pale E. leucotrocha. Typically, head, antenna, and mesoscutum are extensively pale in E. leucotrocha, but occasionally the species can be even darker than E. quieta with mostly black abdomen (at least ventrally extensively pale in E. quieta). There might be a tendency of E. quieta to have a somewhat more deeply excised clypeus than in E. leucotrocha. Differences between females of E. similator and E. quieta might be even less clear. Euura similator females might usually have antennae as long as costa and pterostigma, while in E. quieta the antenna seems to usually reach middle of pterostigma. Euura similator might usually also have a less deeply emarginate clypeus and the abdomen is typically completely pale or the black area on tergites tends to be narrow, while in E. quieta the first tergite is perhaps always black (completely or mostly) and the other tergites are completely yellow or the black area on tergites is broad. Males of E. similator have a typically (nearly) completely yellow abdomen and the valvispina is more strongly bent than in E. quieta (abdomen dorsally mostly black). Males of E. leucotrocha are typically about as pale as females, but darker specimens (mostly black head, thorax, and abdomen dorsally) might not be distinguishable from E. quieta. Euura gracilidentata males and females can usually be distinguished from E. quieta by having smaller subapical tooth, although there might be overlap. Viitasaari (1980) did not study Eversmann’s type specimens of Nematus quietus (DEI-GISHym30033, DEI-GISHym30034), which have black antennae (not ventrally pale). A sequenced specimen from Slovakia (DEI-GISHym17629) is clearly different based on COI and nuclear genes (1529 bp of NaK and POL2) from the Finnish specimens (and from the other sequenced ribesii group specimens). Morphologically, the specimen DEI-GISHym17629 (and DEI-GISHym19035 also from Slovakia) fits better with quieta than the other species. Type material examined Lectotype Nematus quietus, here designated RUSSIA – Tatarstan • ♀; Kasan Province; 55.8° N, 49.1° E; E. Eversmann leg.; ZIN, DEI-GISHym30034. Notes 207 bp of COI of the lectotype is identical to specimens from Finland (e.g., ZMUO.030861) and with at least one nucleotide difference (E. leucotrocha DEI-GISHym21329) to the other specimens of ribesii group. Holotype Nematus olfaciens UNITED KINGDOM – Scotland • ♀; Dundee; 56.48° N, 2.96° E; Aug. 1952; A. Sanderson leg.; reared ex larvae Ribes nigrum; BMNH, B.M.TYPEHYM.1.696. Notes Best morphological match: ZMUO.029695 and ZMUO.029449. Host plants According to Benson (1953) preferably Ribes nigrum, but also R. rubrum and R. uva-crispa. Genetics COI Based on 7 specimens, maximum within-species distance is 5.62% and the nearest neighbour, diverging by a minimum of 0.46%, is Euura leucotrocha. The Finnish specimens (6) are identical. Nuclear Based on 7 specimens, maximum within-species distance is 1.28% (0.07% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.5%, is Euura leucotrocha. The Finnish specimens (6) are nearly identical. Distribution and material examined Palaearctic. Specimens studied are from Finland, Russia, Slovakia, and the United Kingdom.