Euura viduatoides
Creators: name: Prous, Marko
name: Liston, Andrew
name: Monckton, Spencer K.
name: Kramp, Katja
name: Vårdal, Hege
name: Vikberg, Veli
name: Heibo, Erik
name: Mutanen, Marko
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredinidae
Euura
Euura viduatoides

description: 292 Euura viduatoides (Lindqvist, 1960)
Figs 305, 525
Amauronematus viduatoides Lindqvist, 1960a: 127–129.
Amauronematus branderi Lindqvist, 1969: 231–232. Syn. nov.
Diagnosis
The distinctly pale clypeus, pronotum and tegula, smooth mesepisternum, and slightly curved lancet with 14–16 annuli usually enable identification of the females, but separation from E. leucolena (mesepisternum usually slightly matt) might not always be reliable. Two putative males without sequence data (a paratype of viduatoides [http://id.luomus.fi/GL.9214] and ZMUO.032626) have distinctly pale tegula and pronotum (black in most other species, except E. viduata in part) and a similar penis valve to E. leucolena, except that the valviceps is broader.
Female
5.0–6.0 mm. Head black to slightly pale around eyes; labrum pale; clypeus pale; supraclypeal area black; antenna black; thorax black; pronotum extensively pale; tegula extensively pale; pterostigma pale or centrally paler than externally; metafemur mostly black to pale; metatibia pale or brown; hind tarsus black; abdomen mostly black to extensively pale apically; at least hypopygium, valvifer 2 and tergum 9 slightly pale; valvula 3 slightly pale basally; cerci pale; mesepisternum smooth; valvula 3 of medium length, in dorsal view gradually narrowing, with an acute tip.
Male
4.5–5.0 mm (n = 2). Association with female not confirmed. Head black or slightly brown around eyes; labrum pale; clypeus pale; malar space black or slightly pale; supraclypeal area black or slightly pale; antenna black; thorax black; pronotum slightly to extensively pale; tegula slightly to extensively pale; pterostigma brown or centrally paler than externally; metafemur extensively pale; metatibia pale; hind tarsus black; abdomen black; sternum 9 pale; mesepisternum smooth; projection of tergum 8 small.
Type material examined
Holotype Amauronematus viduatoides
FINLAND – Uusimaa • ♀; Helsinki, Lövö; 60.18° N, 24.85° E; 9 Apr. 1952; E. Lindqvist leg.; MZH, http://id.luomus.fi/GL.9213.
Holotype Amauronematus branderi
FINLAND – Häme • ♀; Urjala; 61.08° N, 23.56° E; 7 Jun. 1965; T. Brander leg.; MZH, http://id.luomus. fi/GL.9208.
Notes
The COI sequence (281 bp) of the holotype female of branderi is identical to ZMUO.040884, ZMUO.038738, ZMUO.043842, ZMUO.038736, ZMUO.038737, and ZMUO.038735.
Host plants
Salix pentandra. Kangas (1985) recorded Salix phylicifolia and Macek et al. (2020) S. aurita, but it is not certain that the sawfly species was correctly identified.
Genetics
COI
Only one sequence available. The nearest neighbour, diverging by a minimum of 0%, is Euura rectiserra.
Nuclear
Only one sequence available, a female with haplotypes diverging by 0.09%. The nearest neighbour, diverging by a minimum of 0.45%, is Euura leucolena (ZMUO.037242).
Distribution and material examined
Palaearctic. Specimens studied are from Finland.
Species not assigned to groups
description: Published as part of 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), pp. 1-377 in European Journal of Taxonomy 977 on pages 219-221, DOI: 10.5852/ejt.2025.977.2799, http://zenodo.org/record/15019574