Euura leptocephalus (Thomson, 1863)

Prous, Marko, Liston, Andrew & Mutanen, Marko, 2021, Revision of the West Palaearctic Euura bergmanni and oligospila groups (Hymenoptera, Tenthredinidae), Journal of Hymenoptera Research 84, pp. 187-269 : 187

Euura leptocephalus (Thomson, 1863)

Figs 5B, I , 6B , 11I , 17

Nematus leptocephalus Thomson, 1863: 632. Type locality: Scandinavia, "Lapponia intermedia" (HT).

Similar species.

Most similar species are E. reticulata and similar species in the Euura flavescens group (character states in parentheses), from which it differs by having dorsal margin of lancet angulate at about second or third serrula from apex (not angulate) and apical sutures distinctly inclined apically (not inclined). Valvula 3 is also (usually) slightly narrower compared to Euura flavescens group. Males distinguishable from other species by distinct penis valves.

Genetic data.

COI. Based on 4 specimens, maximum within species distance is 0.76% (4.56% when including representatives from BOLD:AAG3563 and BOLD:ACY4317) and the nearest neighbour, diverging by a minimum of 6.23%, is Euura sylvestris . BINs: BOLD:ADS7391 (Holarctic), possibly also Nearctic BOLD:AAG3563 and BOLD:ACY4317.

Nuclear. Based on 3 specimens, maximum within species distance is 0.07% (0.05% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 2.96%, is Euura viridis .

Host plants and behaviour.

Hosts: Salix spec. ( Lindqvist 1960b); Salix glauca (V. Vikberg: unpublished rearing results). Probably only one generation per year.

Distribution.

West Palaearctic and Nearctic ( Sundukov 2017). Mainly in subarctic and arctic areas. Specimens studied are from Finland, Norway, and Sweden.

Type material.

Nematus leptocephalus . HT, ♀, NHRS-HEVA000003974, NHRS.

Figures

Fig ure 5. Characters of Euura hypoxantha, Euura bergmanni and Euura oligospila groups, females A Euura oligospila DEI-GISHym 84738 B Euura leptocephalus ZMUO. 033448 C Euura lienterica DEI-GISHym 21362 D Euura reticulata ZMUO. 033533 E Euura hypoxantha ZMUO. 035686 F Euura brevivalvis DEI-GISHym 31135 G Euura viridis ZMUO. 035636 H Euura frenalis ZMUO. 035931 I Euura leptocephalus ZMUO. 033448 J Euura brevivalvis DEI-GISHym 84214 K Euura brevivalvis DEI-GISHym 84214 L Euura oligospila ZMUO. 040699 M Euura bergmanni ZMUO. 033423 N Euura bergmanni ZMUO. 040825 O Euura viridis ZMUO. 035636 P Euura sylvestris ZMUO. 038944 Q Euura respondens http: // coll. mfn-berlin. de / u / 111027 R Euura bergmanni DEI-GISHym 31138 S Euura sylvestris DEI-GISHym 21351 T Euura oligospila DEI-GISHym 88899.

Figure 6. Lancets of Euura. A Euura bergmanni DEI-GISHym 12585 B Euura leptocephalus holotype NHRS-HEVA 000003974 C Euura poecilonota DEI-GISHym 21400 D Euura hypoxantha DEI-GISHym 12505.

Figure 11. Penis valves of Euura bergmanni group. A Euura bergmanni ZMUO. 032583 B Euura dispar DEI-GISHym 88519 C Euura viridis ZMUO. 030834 D Euura brevivalvis DEI-GISHym 84227 E Euura brevivalvis ZMUO. 030870 F Euura sylvestris DEI-GISHym 83594 G Euura sylvestris ZMUO. 033416 H Euura glutinosae DEI-GISHym 84096 I Euura leptocephalus DEI-GISHym 88730 J Euura respondens DEI-GISHym 12514.

Figure 17. Euura leptocephalus. Female ZMUO. 033448 (A, B), males DEI-GISHym 12065 (C, D) and DEI-GISHym 88730 (E).