Poupin, J., P. J. Davie, and J. C. Cexus. “A Revision of the Genus Pachygrapsus Randall, 1840 (Crustacea: Decapoda: Brachyura, Grapsidae), With Special Reference to the Southwest Pacific Species”. Zootaxa, vol. 1015, no. 1, July 2005, pp. 1–66, doi:10.11646/zootaxa.1015.1.1.