FIGURE 8. Biostratigraphical ranges of the fossil fauna assemblage as far identified in El Espinal and El Chango quarries. References: 1, Batten (1985); 2, Vega et al. (2006, 2007); 3, Knopf et al. (2006); 4, Brandt et al. (1999); 5, Wieder and Feldmann (1992); 6, Bishop (1983); 7, Wootton (1981); 8, Fraser et al. (1996); 9, Machado and Brito (2006); 10, González-Rodríguez et al. (2004); 11, Alvarado-Ortega (2005); 12, Forey et al. (2003); 13, Silva (2007); 14, Chalifa (1985); 15, Grande and Poyato-Ariza (1999).