Euura oblita (Serville 1823)
- Dataset
- North European gall-inducing Euura sawflies (Hymenoptera, Tenthredinidae, Nematinae)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Hymenoptera
- family
- Tenthredinidae
- genus
- Euura
- species
- Euura oblita
description
Variability. Female: Body length: 4.0 – 5.8 mm. Head with only a small black fleck around each ocellus, varying to a large black patch covering whole ocellar area. Black markings on mesoscutum more or less extensive. Metapleuron from entirely black to nearly completely pale. Terga 1 – 7 black except for downturned lateral margins, or nearly entirely pale. Ratio of length flagellomere 2 / height of eye 1.02 – 1.18. Male: 4.0 – 4.8 mm. Colour variability similar to female, but male on average much darker, e. g. mesoscutum and mesoscutellum completely black. Black mesepisternum with brown fleck on upper half, or completely black. Metafemur with narrow black stripe on posterior edge, to extensively black basally. All abdominal sterna pale, varying to basal sterna mainly black. Total number of specimens examined: 16. Genetic data. The COI barcodes obtained for E. oblita are closely similar to those of the nominal taxa belonging to the E. ischnocera complex, with the possible exception of E. plicalapponum. Similar species. E. oblita resembles species of the ischnocera complex, but the latter have a much darker colour pattern, shorter flagellomeres (ratio length flagellomere 2 / height of eye 0.76 - 1.03), and less acute lancet serrulae: e. g. Fig. 31 (E. oblita lancet: Fig. 28). Bionomics. Host plants: Salix alba, S. × fragilis, S. × rubens (Kopelke 2007 a), S. triandra (Lorenz & Kraus 1957, Beneš 2015 a), S. babylonica, S. vitellina (Beneš 2015 a). Biology: Kopelke (2007 a).
distribution
Distribution. Central Europe (Taeger et al. 2006), British Isles (Benson 1958), southern Scandinavia (Coulianos & Holmåsen 1991), Turkey (Benson 1968), Yakutia (Popov 2011). Occurrence in Sweden: published records; Skåne (Thomson 1871, Benander 1969), Öland (Coulianos & Holmåsen 1991), Västergötland (Benander 1969), Bohuslän (Coulianos & Holmåsen 1991), Jämtland (Haris 2009). Material examined: Skåne.