Acta Palaeontologica Polonica

Evidence of a new carcharodontosaurid from the Upper Cretaceous of Morocco

Andrea Cau, Fabio Marco Dalla Vecchia, and Matteo Fabbri

Acta Palaeontologica Polonica 57 (3), 2012: 661-665 doi:

We report an isolated frontal of a large−bodied theropod from the Cenomanian “Kem Kem beds” of Morocco with an unusualmorphology that we refer to a new carcharodontosaurid distinct from the sympatric Carcharodontosaurus. The specimen shows an unique combination of plesiomorphic and potentially autapomorphic features: very thick and broad bone with a complex saddle−shaped dorsal surface, and a narrow vertical lamina between the prefrontal and lacrimal facets. This study supports the hypothesis that a fourth large theropod was present in the Cenomanian of Morocco together with Carcharodontosaurus, Deltadromeus, and Spinosaurus.

Andrea Cau [], Museo Geologico “Giovanni Capellini”, Via Zamboni 63, I- 40127 Bologna, Italy; Fabio M. Dalla Vecchia [], Institut Catalá de Paleontologia “M. Crusafont”, C/ Escola Industrial 23, E-08201 Sabadell, Spain; Matteo Fabbri [], Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Via La Pira 4, I-50121 Firenze, Italy.