Dinosaurios y otros vertebrados continentales del Cretácico final (Campaniense-Maastrichtiense) de la Península Ibéricacomposición y sucesiones faunísticas

Resumen

Based on skeletal remains, the fossil record of continental vertebrate assemblages from the Late Cretaceous (Campanian-Maastrichtian) of the Iberian Peninsula consists of nearly 50 species, including dinosaurs, crocodyl¡forms, pterosaurs, chelonians, mammals, squamates, amphibians andactinopterygians. New dating and a better stratigraphical correlation of the Iberian localities allowthe recognition of two successive macrofaunal assemblages: a Campanian-Early Maastrichtianassemblage characterised mainly by the dinosaurs Rhabdodon, Lirainosaurus and ankylosaurs, alli-gatoroid crocodyliforms, and turtles such as Solemys and bothremydids; and a Late Maastrichtianassemblage dominated by hadrosaurids, though titanosaurs and gigantic azhdarchid pterosaurs arealso present. Dromaeosaurids, the enigmatic coelurosaur Eurynochodon, the alligatorid Acynodon,and the bothremydid turtle Polysternon occur in both assemblages. Rhabdodon and ankylosaursapparently disappear (or become very rare) at the base of the Late Maastrichtian. A similar turnover has been reported from the northern foothills of the Pyrenees, therefore documenting a faunalchange that appears to have taken place during the early Late Maastrichtian in the Ibero-Armori-can Realm. Distinct titanosaur genera and species of Solemys and Polysternon at the Iberian andOccitanian sites could be due to provinciality.