Euura serela Prous & Liston & Monckton & Kramp & Vårdal & Vikberg & Heibo & Mutanen 2025, sp. nov.

165 Euura serela Prous & Mutanen sp. nov. urn:lsid:zoobank.org:act: B19DC2EB-4225-4287-B14D-E71F41C0A562 Figs 81–82, 158, 393 Diagnosis Most similar to E. latibasis, E. renei, and E. seriepunctata. Serrulae in E. latibasis may be more protruding than in serela sp. nov. Lamnium of E. serela (although base of the lancet is damaged in the only available specimen) may be similar to those of E. renei and E. seriepunctata (more than 2.3 times as long as radix), while lamnium is 1.8–1.9 times as long as radix in E. latibasis. Black hind tarsi in E. latibasis and E. renei might help to separate them from E. serela (pale hind tarsi). Euura renei has a pale median mesoscutal lobe and extensively black abdomen dorsally, whereas the median mesoscutal lobe of E. serela has a large triangular black fleck and the abdomen is more extensively pale. Euura seriepunctata may be overall paler (nearly completely pale, except for dorsal black dots or line on the abdomen) than E. serela. However, as only one female of E. serela and a few (E. latibasis, E. renei) or small numbers (E. seriepunctata) of specimens of the other species are known, the mentioned differences between the species might be even weaker. Etymology The species name, a noun in apposition, is a combination of the first letters of the names of the most similar species (se riepunctata, re nei, la tibasis). Type material Holotype FINLAND – Inari Lapland • ♀; Utsjoki, Ailegas; 69.877° N, 27.065° E; 6 Jul. 2018; M. Mutanen, N. Mutanen and A. Mutanen leg.; ZMUO, ZMUO.035752. Paratype FINLAND – Lapin Lääni • 1 ♂; Pöyrisjärvi; 68.673° N, 23.859° E; 17 Jul. 2015; M. Mutanen leg.; ZMUO, ZMUO.028330. Description Female holotype (ZMUO.035752) Body 5.5 mm. Colour mostly pale. Mandibles reddish-brown at apex; antennomeres 1–2 somewhat darkened; maxilla (except palps), dorsal dentorial maculae and area around and between ocelli brown or black; eyes black; propleuron, prosternum, anterior triangle on median mesoscutal lobe, lateral mesoscutal lobe anteriorly and posteriorly, mesoscutellar appendage centrally, and mesepisternum ventrally brown or black; mesepimeron somewhat darkened; metapleuron partly black; metanotum (except anterolateral corners) black; coxae basally slightly black; abdominal terga 1–7 centrally brown or black and with brown or black dots laterally. Clypeus deeply emarginate; frontal area between antennae raised, angulate; postocellar area about 2.5 times as broad as long; antenna somewhat longer than costa; mesepisternum smooth; claws bifid; valvula 3 in dorsal view not or only slightly tapering, slightly longer than broad, without posterior invagination. Lancet with 18 serrulae; lamnium distinctly longer than radix; serrulae triangular with numerous microdenticles, not strongly protruding, and with indistinct cypsellae; hair-like setae mostly (except on basalmost and some apical annuli) longer than half of annulus length, absent on apical 3 annuli. Male paratype (ZMUO.028330) Body 5 mm. Colour mostly black. Labrum pale; labial and maxillary palps brown; mandibles reddish-brown at apex, basally pale; clypeus mostly pale; supraclypeal area slightly pale; orbits ventrally and dorsally pale; pronotum posteriorly extensively pale; tegula pale; all tibiae and tarsomere 1 or tarsomeres 1–3 of fore and middle legs pale; hind tarsus brown or slightly pale; apical half to two-thirds of femora pale; trochanters and trochantelli slightly to extensively pale; coxae apically pale; pterostigma and costa brown; sternum 9 and tergum 8 posteriorly (except projection in middle) pale. Clypeus distinctly emarginate; frontal area between antennae raised, angulate; postocellar area about 2.5 times as broad as long; antenna about as long as costa and pterostigma combined; mesepisternum smooth; claws bifid; projection of tergum 8 distinct, about as long as broad and with truncate apex. Host plants Unknown. Genetics COI Specimens belong to BOLD:ADD3400. Based on 2 specimens, maximum within-species distance is 0.15% and the nearest neighbours, diverging by a minimum of 2.89%, are Euura flavescens, E. pravus, and E. reticulata. Nuclear Only one sequence available, a female with haplotypes diverging by 0.06%. The nearest neighbour, diverging by a minimum of 0.7%, is Euura seriepunctata. Distribution and material examined Palaearctic. Specimens studied are from Finland.