Euura dahlbomi

• Main Authors: Liston, Andrew, Vikberg, Veli, Mutanen, Marko, Nyman, Tommi, Prous, Marko
• Format: Other/Unknown Material
• Language: unknown
• Published: 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Hymenoptera; Tenthredinidae; Euura; Euura dahlbomi; Lappland; Torre; Vassijaure; Lapland
• Online Access: https://zenodo.org/record/8225913; https://doi.org/10.5281/zenodo.8225913

Euura dahlbomi (Thomson, 1871) Figures 5, 17, 18C Nematus dahlbomi Thomson, 1871: 134–135. Described: syntypes, ♀. Published type locality: Lappland. Lectotype (examined) designation by Lindqvist (1954). Amauronematus dahlbomi: Konow, 1890. Nematus dahlbomii: de Dalla Torre, 1894; misspelling. Pontopristia dahlbomi: Lindqvist, 1961. Nematus (Pontopristia) dahlbomi: Zhelohovcev, 1988. Amauronematus (Pontopristia) dahlbomi: Liston, 1995. Euura dahlbomi: Goulet & Bennett, 2021. Pontopristia lapponica Malaise, 1921: 14. Described: syntypes, 8♀, 2♁. Published type locality [as comment under P. romani, p. 14]: Vassijaure, Lappland [Sweden, Vassijaure]. Lectotype designated below. Synonymy with suavis var. fusca by Conde (1938). Synonymy with dahlbomi by Lindqvist (1961). Pontopristia suavis var. fusca Malaise, 1921: 12–13. Described: syntypes, 7♀, 2♁ (?NHRS, not located). Published type locality: Vassijaure, Lapland [Sweden, Vassijaure]. Synonymy with N. dahlbomi by Lindqvist (1954). Diagnosis. Female: The lancet of this species is highly distinctive, with marginal serrulae developed only on the first and second annuli and the apical half of the lamnium, and some ctenidia visible on the basal annular sutures (Fig. 17A–B). Male: So far, this is the only amentorum group male, apart from that of E. amentorum, with a pale fore wing costa and stigma (Fig. 5G). The male of E. amentorum differs in its very long extension of pseudoceps (Fig. 18A), and paler colouration of head and body (Fig. 3E–F). The penis valve strongly resembles those of E. freyja (Fig. 18 E–F) and E. microphyes (Fig. 18D), but E. dahlbomi has edge of paravalva below the valvispina less strongly downward-deflected. Description. Female (Fig. 5A). Length 3.5–4.0 mm. Black. Pale are more or less mandibles, palps, labrum, tibiae, apices of femora. Cerci pale. Wing veins including fore wing pterostigma pale. Head (Fig. 5B). In dorsal view moderately contracted behind eyes, and length posterior of eye about 0.50–0.60 × length of eye. Mostly dull with ...