FIGURE 9. Biogeographical distribution of Cenomanian fossil fish assemblages in the Eastern and Western regions of the Tethys Sea (above), Tlayúa is an Albian age locality included only for comparative purposes). Common fossil fish genera found in El Espinal plus El Chango quarries and the other localities (below). Based on data from Forey et al. (2003), González-Rodríguez and Bravo-Cuevas (2005), Alvarado-Ortega (2005), and Applegate et al. (2006).