• Royidris in Myrmicinae, Eutetramorium genus group: Bolton & Fisher, 2014: 8.
• Royidris in Myrmicinae, Crematogastrini: Ward et al., 2015: 77.
• Royidris in Myrmicinae, Crematogastrini, Podomyrma genus group: Blaimer et al., 2018: 7.
• Royidris as genus: all authors.

Citations

• Blaimer, B. B.; Ward, P. S.; Schultz, T. R.; Fisher, B. L.; Brady, S. G. 2018. Paleotropical diversification dominates the evolution of the hyperdiverse ant tribe Crematogastrini (Hymenoptera: Formicidae). Insect Systematics and Diversity 2 (5):1-14. 10.1093/isd/ixy013 PDF
• Bolton, B.; Fisher, B. L. 2014. The Madagascan endemic myrmicine ants related to Eutetramorium (Hymenoptera: Formicidae): taxonomy of the genera Eutetramorium Emery, Malagidris nom. n., Myrmisaraka gen. n., Royidris gen. n., and Vitsika gen. n. Zootaxa 3791 (1):1-99. PDF
• Cantone, S. 2017. Winged ants – The male. Dichotomous key to genera of winged male ants in the world. Behavioral ecology of mating flight. São Paulo: Autopubblicato, 318 pp. PDF
• Fisher, B. L.; Bolton, B. 2016. Ants of the world. Ants of Africa and Madagascar. A guide to the genera. Berkeley: University of California Press, ix + 503 pp.
• Ward, P. S.; Brady, S. G.; Fisher, B. L.; Schultz, T. R. 2015. The evolution of myrmicine ants: phylogeny and biogeography of a hyperdiverse ant clade (Hymenoptera: Formicidae). Systematic Entomology 40:61-81. 10.1111/syen.12090 PDF