Macrogryphosaurus is a genus of elasmarian dinosaur from the Coniacian-aged Sierra Barrosa Formation of Argentina in Patagonia. It was described by Jorge Calvo and colleagues in 2007, with M. gondwanicus as the type and only species.
J. O. Calvo, J. D. Porfiri, and F. E. Novas. 2007. Discovery of a new ornithopod dinosaur from the Portezuelo Formation (Upper Cretaceous), Neuquén, Patagonia, Argentina. Arquivos do Museu Nacional, Rio de Janeiro 65(4):471-483
Bibliography (1)
J. O. Calvo, J. D. Porfiri, and F. E. Novas. 2007. Discovery of a new ornithopod dinosaur from the Portezuelo Formation (Upper Cretaceous), Neuquén, Patagonia, Argentina. Arquivos do Museu Nacional, Rio de Janeiro 65(4):471-483