Arge pagana (Panzer, 1797)

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

Arge pagana (Panzer, 1797)

Tenthredo pagana Panzer, 1797

Hylotoma? stephensii (Leach, 1817, Hylotoma )

Distribution

England, Wales

Notes

Arge stephensii differs very markedly, in the extreme development of pale body markings, from all known W. Palaearctic populations of Arge pagana . Traditionally, Arge stephensii has been regarded as an endemic British subspecies of Arge pagana . Further studies [here a DNA analysis might offer good clues] are definitely required. The possibility cannot be excluded that Arge stephensii is a separate species originally introduced from the E. Palaearctic or Oriental Regions, where Arge is both extremely species-rich and poorly investigated.