Euura cadderensis ( Cameron, 1875 )

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 : 118-119

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.