Checklist of British and Irish Hymenoptera - Sawflies, ' Symphyta' Liston, Andrew D. Knight, Guy T. Sheppard, David A. Broad, Gavin R. Livermore, Laurence Biodiversity Data Journal 2014 2 1168 1168 Thomson, 1871 Thomson 1871 0 1168 subFamily Nematinae  Notes Unplaced species of Nematinae:  Nematus placidusCameron, 1878 Placed by Konow (1905)as a synonym of Pristiphora leucopodia(Hartig, 1837), a species which has never been found in the British Isles. Konow probably did not examine the type of Nematus placidus, which according to Benson (1943b), is lost.