“SOBRE UN PYGIDIIDAE (PISCES, SILURIFORMES) DEL EOCENO DE RIO NEGRO”, AMGH, vol. 3, no. 7, pp. 185–189, Jul. 2013, Accessed: Oct. 10, 2025. [Online]. Available: https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/1144