“DICHOGRAPTUS FASCICULATUS NOV. SP. (GRAPTOLITHINA) EN LA FORMACION GUALCAMAYO (ORDOVICICO), PRECORDILLERADE SAN JUAN, REPUBLICA ARGENTINA”. Ameghiniana 31, no. 1 (December 21, 2013): 67–71. Accessed May 3, 2026. https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/2190.