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Un dinosaurio ceratopsiano del Cretácico tardío de Europa con afinidades asiáticas
Attila Osi1, Richard J Butler, David B Weishampel
1Hungarian Academy of Sciences, Hungarian Natural History Museum, Research Group for Paleontology, Ludovika tér 2, Budapest 1083, Hungary. hungaros@freemail.hu
Nature
|May 28, 2010
Resumen
Nuevos fósiles de dinosaurios con cuernos de Hungría revelan que los ceratopsios (dinosaurios con cuernos) vivieron en la Europa del Cretácico Tardío. Este descubrimiento desafía las ideas anteriores sobre la distribución de los dinosaurios y los patrones de migración.
Área de la Ciencia:
- Paleontología Paleontología.
- La evolución de los dinosaurios
- La biogeografía es la biogeografía.
Sus antecedentes:
- Los ceratopsios (dinosaurios con cuernos) eran diversos y abundantes en el período Cretácico.
- Anteriormente se pensaba que su distribución geográfica estaba limitada a Asia y América del Norte.
Objetivo del estudio:
- Para describir el nuevo material craneal ceratopsiano de Hungría.
- Reevaluar las hipótesis biogeográficas de las faunas de dinosaurios del Cretácico tardío europeo.
Principales métodos:
- Descripción del material craneal fósil.
- Análisis comparativo con taxones ceratopsianos conocidos.
- Análisis biogeográfico de la distribución de los dinosaurios.
Principales resultados:
- Descubrimiento de Ajkaceratops kozmai, un ceratopsiano coronosaurio del Cretácico tardío de Hungría.
- Ajkaceratops muestra similitud con los asiáticos "bagaceratopsids".
- Demuestra la presencia de ceratopsios en la Europa del Cretácico Tardío, lo que sugiere múltiples eventos de dispersión.
Conclusiones:
- Los ceratopsios ocuparon la Europa del Cretácico tardío, desafiando los modelos biogeográficos anteriores.
- La presencia de Ajkaceratops en el archipiélago occidental de Tethyan sugiere una dispersión de "salto de isla a isla".
- La composición de la fauna de dinosaurios europeos requiere una reevaluación.
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