Calvo, Cristian, César A. Laurito, and Ana L. Valerio. “Taxonomic Considerations about the Paleo-Ichthyofauna of the Locality of Alto Guayacán, Uscari Formation, Late Miocene-Early Pliocene [N17 a N19]: Record of the Genus Parascyllium”. Revista geológica de América central 68 (May 22, 2023): 1–7. Accessed May 18, 2024. https://www.revistas.ucr.ac.cr/index.php/geologica/article/view/55169.