Pachynematus clitellatus (Serville, 1823)

Liston, Andrew D., Knight, Guy T., Sheppard, David A., Broad, Gavin R. & Livermore, Laurence, 2014, Checklist of British and Irish Hymenoptera - Sawflies, ' Symphyta', Biodiversity Data Journal 2, pp. 1168-1168 : 1168

Pachynematus clitellatus (Serville, 1823)

Nematus clitellatus Serville, 1823

Nematus trisignatus ( Förster, 1854, Nematus )

Pachynematus foveolatus Konow, 1903

Pachynematus truncatus Benson, 1948

Pachynematus extensicornis (Norton, 1861): misident.

Distribution

England, Scotland, Wales, Ireland

Notes

Taeger and Blank (1998) regard Pachynematus clitellatus and Pachynematus fallax as morphologically highly variable species, which together include most of the previously described W. Palaearctic taxa. Their arguments for this are well reasoned, but at present it seems prudent to continue to regard several of the more distinctive morphological segregates, treated as species by Benson (1958), as separate taxa, because morphologically intermediate specimens are rare (at least in the male sex). The taxonomy of the whole group requires further intensive work, including genetic analysis. According to Taeger and Blank (1998) Pachynematus kirbyi , treated here as valid, is a synonym of Pachynematus clitellatus .