Euura flavescens (Stephens, 1835)

Prous, Marko, Liston, Andrew, Monckton, Spencer K., Kramp, Katja, Vårdal, Hege, Vikberg, Veli, Heibo, Erik & Mutanen, Marko, 2025, West Palaearctic species of Euura Newman, 1837 (Hymenoptera, Tenthredinidae), European Journal of Taxonomy 977, pp. 1-377 : 99

152 Euura flavescens group

Externally, most species in the group can be confused with members of the E. bipartita group. Females can be difficult to distinguish from members of the E. bipartita group even based on lancets. Based on penis valves, males are easier to distinguish from the E. bipartita group, but penis valves can be similar to members of the melanocephalus , miliaris , vittata , toeniata , and variator groups. Males are not clearly distinguishable from each other based on penis valves and often also not externally. Males of E. flavescens are often ventrally almost completely pale, whereas those of E. dorsata , E. latibasis , E. seriepunctata , and E. serela Prous & Mutanen sp. nov. are (usually?) ventrally darker, but may not always be distinguishable from E. flavescens . Males of E. lienterica (sometimes ventrally rather pale), E. pravus , E. reticulata , and E. squamicauda are usually nearly completely or mostly black, but those of E. pravus tend to be larger (6–7 mm, the other species less than 6 mm). Males of E. elongatula , E. pallidinervis , E. pallidior , and E. renei are not known.