Cruciol, A. H., Noll, F. B., Stange, L. A., & Lopes, R. B. (2026). Five new species of the Zethus spinosus species group (Hymenoptera, Vespidae, Eumeninae, Zethus). Zootaxa, 5748(1), 56–72. https://doi.org/10.11646/zootaxa.5748.1.2