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Vilhelmsen, L. 2020. Two new species of Ophrynopus Konow, 1897 (Hymenoptera: Orussidae), with a new definition of the genus. Zootaxa. 4790, 1 (Jun. 2020), 121–137. DOI:https://doi.org/10.11646/zootaxa.4790.1.7.