The first crocodyloform remains from the La Parrita locality, Cerro del Pueblo Formation (Campanian), Coahuila, Mexico

Abstract

espanolEl registro de tetrapodos terrestres en la Formacion Cerro del Pueblo (Cretacico tardio, Campaniano) en Coahuila, incluye tortugas, pterosaurios, dinosaurios y crocodyliformes. Este ultimo grupo esta representado por goniofolididos, eusuquios indeterminados y Brachychampsa montana. En este trabajo se reportan los primeros restos de crocodyliformes de la localidad La Parrita, Formacion Cerro del Pueblo, con base en un diente aislado, vertebras y osteodermos. La asociacion de crocodyliformes, tortugas, dinosaurios y oogonias de cariofitas, proporcionan evidencia de ambientes fluviales en una llanura deltaica de tipo tropical para la Formacion Cerro del Pueblo durante el Cretacico tardio. EnglishThe record of land tetrapods of the Cerro del Pueblo Formation (Late Cretaceous, Campanian), in Coahuila, includes turtles, pterosaurs, dinosaurs, and crocodyliforms. This last group is represented only by goniopholidids, indeterminate eusuchians, and Brachychampsa montana. In this work we report the first crocodyliform remains from La Parrita locality, Cerro del Pueblo Formation, based on one isolated tooth, vertebrae, and osteoderms. The association of crocodyliforms, turtles, dinosaurs, and charophyte oogonia provide evidence for stagnant to fluvial environments on a delta plain with tropical climate for the Cerro del Pueblo Formation during the Late Cretaceous.