A bizarre, humped Carcharodontosauria (Theropoda) from the Lower Cretaceous of Spain

Francisco Ortega (), Fernando Escaso and José L. Sanz
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Francisco Ortega: Grupo de Biología, Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Paseo Senda del Rey 9, 28040 Madrid, Spain
Fernando Escaso: Grupo de Biología, Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Paseo Senda del Rey 9, 28040 Madrid, Spain
José L. Sanz: Unidad de Paleontología, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain

Nature, 2010, vol. 467, issue 7312, 203-206

Abstract: The hunchback of Las Hoyas An almost complete and remarkably conserved skeleton of a medium-size dinosaur discovered in Las Hoyas, Spain, has implications for the debate on the role and origins of feather-like structures. This new carcharodontosaur had pennaceous 'feathers' on the ulna, making it the most basal theropod known with this feature, thus increasing the spread of possibilities for explaining the origin of feathers in this dinosaur subgroup. More mysterious, however, is the presence of a hump-like structure derived from neural spines on two dorsal vertebrae, and with no obvious function.

Date: 2010
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DOI: 10.1038/nature09181

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