Durante el XX Annual Meeting de la EAVP, celebrado en Sabadell entre 26 de junio y el 1 de julio, se presentó la comunicación titulada “Abelisaurid teeth from the Upper Cretaceous of Poyos (Guadalajara, Spain)”. En este trabajo, se ha descrito una colección de dientes aislados de dinosaurios terópodos procedentes del yacimiento de Poyos y se ha discutido su identificación taxonómica con base en las características morfológicas y el análisis estadístico multivariante de sus variables morfométricas. Estos análisis han permitido identificar los materiales de Poyos como pertenecientes a un grupo de abelisáuridos con características dentales similares a las de Arcovenator escotae descrito en el Campaniense de Francia y también se ha comparado con dientes aislados en diferentes localidades del Cretácico Superior de España. A continuación, el resumen del trabajo:
The Campanian-Maastrichtian locality of Poyos (Villalba de la Sierra Formation. Guadalajara, Spain) has yielded an abundant fossil record of reptiles, mostly composed of eggs and osteological elements of sauropod dinosaurs, but also by materials attributed to turtles, crocodiles, pterosaurs, and theropod dinosaurs. Among those, elements belonging to a medium-sized theropod have been preliminarily attributed to Abelisauroidea. Here we describe a sample of isolated theropod teeth collected in Poyos and we discuss its taxonomy based on statistical and morphological analyses. The sample includes about twenty isolated, relatively complete, and well-preserved tooth crowns. They correspond to relatively large-sized teeth with crown height (CH) between 22 and 58 mm (38 mm in average) and strongly labiolingually compressed (crown base ratio = 0.6 in average). The combination of morphological and morphometric features is compatible with that described for abelisaurid lateral teeth, which bear several features that include weakly convex to almost straight distal profile of the crowns, crowns with mesial carina mostly extending to the cervix or very close to it and the distal carina centrally placed on the distal margin. The Poyos specimens are similar to the teeth associated with the holotype of Arcovenator escotae from the late Campanian of France and to some isolated teeth related to that taxon from different Upper Cretaceous localities of Spain. This analysis supports the hypothesis on the presence of a medium-sized abelisaurid in Poyos and confirms that this clade was a relatively common component on the theropod fauna from the European Late Cretaceous.
Entradas
No hay comentarios:
Publicar un comentario