Selis, Marco. 2025. “Solving the Identity of Odynerus spiricornis Spinola, With Notes on the South European Species of Paragymnomerus Blüthgen (Hymenoptera, Vespidae, Eumeninae)”. Zootaxa 5601 (3). Auckland, New Zealand:558-70. https://doi.org/10.11646/zootaxa.5601.3.9.