Figures 41-48 from: Liston A, Mutanen M, Viitasaari M (2019) On the taxonomy of Heterarthrus (Hymenoptera, Tenthredinidae), with a review of the West Palaearctic species. Journal of Hymenoptera Research 72: 83-126. https://doi.org/10.3897/jhr.72.39339

Figures 41-48 Heterarthrus41–46H. fiora ♀: 41, 42 head dorsal at different viewing angles, holotype 43 DEI-GISHym83900 lateral 44, 45 DEI-GISHym83900 sawsheath dorsal, lateral 46 DEI-GISHym31977 antenna 47, 48 head frontal ♀: 47H. vagans DEI-GISHym11091 48H. kamtchaticus (H. aihinoensis holotype). Scale bar: 1mm.