Magalhães, C., Wehrtmann, I.S. and Mantelatto, F.L. 2025. Revalidation of Ptychophallus campylus Pretzmann, 1968, a freshwater crab species from Costa Rica (Brachyura: Decapoda: Pseudothelphusidae). Revista de Biología Tropical. 73, S2 (Mar. 2025), e64534. DOI:https://doi.org/10.15517/rev.biol.trop. v73iS2.64534.