FIGURE 41 in Ammonoids and their biozonation across the Santonian-Campanian boundary in north-eastern Coahuila, Mexico

FIGURE 41. The early Campanian World with localities presenting ammonites with affinities to northeastern Coahuila (e.g., Tepeyac). Endemic species are summarized in the asterisk. Species with a wider occurrence are marked in other regions, but not in the northwestern Gulf region. Map courtesy of Scotese (2021).