Penis valves of Pristiphora ruficornis group. 87 P. bifida DEI-GISHym80000 (arrow indicates a dorsal depression of the pseudoceps) 88 P. frigida NHRS-HEVA000003861 (arrow indicates a membranous fold near the tip of the ventro-apical spine) 89 P. confusa DEI-GISHym31265 90 P. confusa PR.460VV 91 P. subopaca DEI-GISHym80030, left penis valve 92 P. subopaca paratype 93 P. pusilla DEI-GISHym80029, left penis valve with strong dorsal depression of the pseudoceps (arrow) 94 P. pusilla DEI-GISHym80029, right penis valve with weak dorsal depression of the pseudoceps 95 P. opaca PR.459VV 96 P. opaca, paratype of P. amaura Lindqvist.

  Part of: Prous M, Vikberg V, Liston A, Kramp K (2016) North-Western Palaearctic species of the Pristiphora ruficornis group (Hymenoptera, Tenthredinidae). Journal of Hymenoptera Research 51: 1-54.