Borges, R.C. and Silveira, O.T. 2019. Revision of the species-group of Mischocyttarus (Omega) filiformis (de Saussure 1854), with description of three new species (Hymenoptera, Vespidae). Zootaxa. 4657, 3 (Aug. 2019), 545–564. DOI:https://doi.org/10.11646/zootaxa.4657.3.7.