Ward, P. S. “A Review of the Pseudomyrmex ferrugineus and Pseudomyrmex goeldii Species Groups: Acacia-Ants and Relatives (Hymenoptera: Formicidae)”. Zootaxa, vol. 4227, no. 4, Feb. 2017, pp. 524–542, doi:10.11646/zootaxa.4227.4.3.