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Magalhães, C., Wehrtmann, I.S., Lara, L.R. and Mantelatto, F.L. 2015.

Taxonomy of the freshwater crabs of Costa Rica, with a revision of the genus Ptychophallus Smalley, 1964 (Crustacea: Decapoda: Pseudothelphusidae)

. Zootaxa. 3905, 3 (Jan. 2015), 301–344. DOI:https://doi.org/10.11646/zootaxa.3905.3.1.