“UN AMONITE HETEROMORFO (SPIROCERATIDAE) DEL BAYOCIANO SUPERIOR DEL PASO DEL ESPINACITO, SAN JUAN, ARGENTINA” (2013) Ameghiniana, 30(2), pp. 129–134. Available at: https://ameghiniana.org.ar/index.php/ameghiniana/article/view/2145 (Accessed: 11 October 2025).