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Journal of the Geological Society; 1999; v. 156; issue.3; p. 449-452;
DOI: 10.1144/gsjgs.156.3.0449
© 1999 Geological Society of London

SPECIAL

On the presence of Allosaurus fragilis (Theropoda: Carnosauria) in the Upper Jurassic of Portugal: first evidence of an intercontinental dinosaur species

B. P. PÉREZ-MORENO1, D. J. CHURE2, C. PIRES3, C. MARQUES DA SILVA4, V. DOS SANTOS3, P. DANTAS3, L. PÓVOAS3, M. CACHÃO4, J. L. SANZ1 & A. M. GALOPIM DE CARVALHO3,4

1 Unidad de Paleontologia, Departamento de Biologia,Facultad de Ciencias, Universidad Autonoma de Madrid,28049 Madrid, Spain (e-mail: nino{at}uam.es)
2 Dinosaur National Monument, Box 128, Jensen, UT 84035,USA
3 Museu Nacional de Historia Natural
4 Departamento deGeologia e Centro de Geologia da Universidade de Lisboa,Rua da Escola Politeécnica, 58, P-1294 Lisboa Codex,Portugal

The species Allosaurus fragilis, from the Morrison Formation of North America (Kimmeridgian–Tithonian, Upper Jurassic), is one of the best known members of the Theropoda, the group including all predatory non-avian dinosaurs and birds. Here, we report on the first diagnostic theropod remains discovered from the Jurassic of the Iberian Peninsula. The specimen is the first evidence of A. fragilis outside North America. Thus, this taxon represents the first dinosaur species found on two different continents, and suggests the existence of a ‘land bridge’ between North America and Europe during the Late Jurassic.


Keywords: Upper Jurassic, Dinosauria, Theropoda, Allosaurus, Palaeobiogeography.




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