Villalobos, Carlos R. “<i>Ptychophallus costaricensis</i≫, a New Freshwater Crab from Costa Rica”. Revista de Biología Tropical 21, no. 2 (July 1, 1973): 197–203. Accessed July 3, 2024. https://revistas.ucr.ac.cr/index.php/rbt/article/view/27274.