Heterarthrus ♀ 15, 16 basal abdominal terga: 15 H. fiora sp. nov. holotype 16 H. leucomela DEI-GISHym31980 17, 18 median mesoscutal lobes: 17 H. fiora sp. nov. DEI-GISHym31976 18 H. vagans DEI-GISHym83893 19–21 lancets: 19 H. wuestneii DEI-GISHym31983 20 H. cuneifrons DEI-GISHym31979 21 H. fiora sp. nov. DEI-GISHym31976.

 
 
  Part of: 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