Pterosaurs (Pterosauria) from the Cerro del Pueblo Formation (Late Campanian) of Coahuila, Mexico

Héctor E. Rivera-Sylva , David Hone, Martha Aguillón-Martínez , José R. Guzmán-Gutiérrez , David Morales-Flores, Iván Sánchez-Uribe , José Flores-Ventura and Rafael Vivas-González

The Late Campanian Cerro del Pueblo Formation, located in southeastern Coahuila, Mexico, has produced a diverse array of vertebrate fossils. However, pterosaur remains from this unit are notably scarce. In this study, we describe new pterosaur material from the formation. The specimens include a fragmentary vertebra identified as belonging to an indeterminate, but derived pterodactyloid, along with the distal condyle of a left metacarpal, referable to an azhdarchoid pterosaur, and a left manus print. While these specimens provide additional evidence of pterosaur presence in the region during the Late Cretaceous, their fragmentary nature limits precise taxonomic and ichnotaxonomic identification. Nevertheless, they highlight the potential for future discoveries that could refine our understanding of the diversity and distribution of pterosaurs in Mexico.