Euura cadderensis ZMUO.
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 cadderensis

description: 170 Euura cadderensis (Cameron, 1875)
Figs 190, 419
Nematus cadderensis Cameron, 1875: 127–129. Syntypes ♀♀ ♂♂ (BMNH?), not examined. Type locality: United Kingdom, Scotland; Glasgow area, Rannoch and Kingussie. Both Salix cinerea and Betula are mentioned as host plants.
Amauronematus moricei Konow, 1902a: 388–389. Lectotype designated below. Syn. nov.
Pteronidea macroserrata Lindqvist, 1943: 105–107. Lectotype designated below. Synonymy by Lindqvist (1960c).
Pteronidea nuortevai Lindqvist, 1958: 96–97. Syn. nov.
Diagnosis
Possibly not morphologically distinguishable from E. ferruginea. Serrulae may be more protruding in E. cadderensis than in E. ferruginea, although variability at least within E. ferruginea can make the difference weak to non-existent. Euura kangasi is also very similar, but may have black hind tarsi which seem to be paler in E. cadderensis and E. ferruginea. Euura ferruginea can be rather dark (abdomen dorsally and thorax completely or nearly completely black) which might not be the case for E. cadderensis females. Based on the host (Betula) and nuclear data, we keep E. cadderensis as a distinct species.
The lectotype of Pteronidea macroserrata is also the lectotype of Amauronematus moricei. Lindqvist (1943) examined this specimen as well as a second syntype of A. moricei and determined the second syntype (not located by us), as Pteronidea ferruginea, with which Amauronematus moricei has previously mostly been synonymised.
Type material examined
Lectotype Amauronematus moricei, here designated
GERMANY – Brandenburg • ♀; Finkenkrug; 52.56° N, 13.03° E; 30 m a.s.l.; SDEI, GBIF-GISHym4745.
Lectotype Pteronidea macroserrata, here designated
GERMANY – Brandenburg • ♀; Finkenkrug; 52.56° N, 13.03° E; 30 m a.s.l.; SDEI, GBIF-GISHym4745.
Notes
The lectotype of Amauronematus moricei and Pteronidea macroserrata is the same specimen, making these names objective synonyms. Two paralectotypes of Pteronidea macroserrata (Finland, Nurmes, MZH?), were not examined. They were reared from larvae on Betula (Lindqvist 1943).
Holotype Pteronidea nuortevai
FINLAND – Häme • ♀; Vuohiniemi; 60.95° N, 24.13° E; 29 Jul. 1948; P. Nuorteva leg.; MZH, http://id.luomus.fi/GL.3440.
Notes
Completely pale and with prominent serrulae.
Host plants
Betula pubescens. According to some specialists only Betula spp., but others state that Salix spp. are host plants (e.g., Kontuniemi 1960; Kangas 1985).
Genetics
COI
Based on 5 specimens, maximum within-species distance is 0.46% and the nearest neighbours, diverging by a minimum of 0%, are Euura ferruginea and E. kangasi.
Nuclear
Based on 5 specimens, maximum within-species distance is 0.26% (0.44% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.27%, is Euura ferruginea.
Distribution and material examined
Palaearctic. Specimens studied are from Finland, and Germany.
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 118-119, DOI: 10.5852/ejt.2025.977.2799, http://zenodo.org/record/15019574