Presence of diminutive hadrosaurids (Dinosauria: Ornithopoda) from the Maastrichtian of the south-central Pyrenees (Spain)

Journal of Iberian geology

J. Company¹  J.I. Canudo²  P. Cruzado-Caballero³ 

[1] Departamento de Ingeniería del Terreno, Universidad Politécnica de Valencia;Grupo Aragosaurus-IUCA, Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza;Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro, Isidro Lobo y BelgranoGrupo Aragosaurus-IUCA, Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza

关键词: hadrosaurids;   

DOI  :  10.5209/rev_JIGE.2015.v41.n1.48656

学科分类：地质学

来源: Universidad Complutense de Madrid * Servicio de Publicaciones

【 摘 要 】

In recent years a rich and diverse fauna of hadrosaurid dinosaurs has been described in the Upper Cretaceous of the Pyrenees. Recent fieldwork carried out in the upper Maastrichtian levels of the Tremp Formation, in the south-central Pyrenees (province of Huesca, northeastern Spain), has allowed us to recover diminutive fossil bones referable to hadrosaurid dinosaurs. To date, small-sized specimens had not been reported in the area. The remains consist of small vertebrae and fragmentary long bones found in a relatively small area, so it is assumed that they probably belong to individuals of a single population. A morphological examination and a histological study reveal that they represent specimens of advanced ontogenetic stage and allow the identification of an undescribed taxon of small-bodied hadrosaurids. In other parts of Europe, discoveries of small dinosaurs have been linked to insularity. These findings bring to light the smallest hadrosaurid known in Europe to date.

【 授权许可】

Unknown