Brown, G. 2008. Umbothynnus, a newly recognised genus for the Rhagigaster alexius Guérin group of species (Hymenoptera: Tiphiidae: Thynninae: Rhagigasterini) from northern Australia. Zootaxa. 1933, 1 (Nov. 2008), 43–58. DOI:https://doi.org/10.11646/zootaxa.1933.1.5.