PANGEA

A Complete Skull of an Early Cretaceous Sauropod and the Evolution of Advanced Titanosaurians

BIBLIOGRAFIA

Nominativo Autori	ZAHER H., POL D., CARVALHO A.B., NASCIMENTO P.M., RICCOMINI C., LARSON P., JUAREZ-VALIERI R., PIRES-DOMINGUES R., DA SILVA N.J., DE ALMEIDA CAMPOS D.
Anno	2011
Titolo	A Complete Skull of an Early Cretaceous Sauropod and the Evolution of Advanced Titanosaurians
Rivista	PLOS ONE
Edizione	February 2011
Serie Volume	6(2): 1-10
Illustrazioni	FIGG. 7
Parole chiave / Key words	Paleontologia, Vertebrata, Dinosauri, Cretaceous, Titanosauria, Nemegtosauridae, Tapuiasaurus macedoi.
Riassunto / Abstract	Advanced titanosaurian sauropods, such as nemegtosaurids and saltasaurids, were diverse and one of the most important groups of herbivores in the terrestrial biotas of the Late Cretaceous. However, little is known about their rise and diversification prior to the Late Cretaceous. Furthermore, the evolution of their highly-modified skull anatomy has been largely hindered by the scarcity of well-preserved cranial remains. A new sauropod dinosaur from the Early Cretaceous of Brazil represents the earliest advanced titanosaurian known to date, demonstrating that the initial diversification of advanced titanosaurians was well under way at least 30 million years before their known radiation in the latest Cretaceous. The new taxon also preserves the most complete skull among titanosaurians, further revealing that their low and elongated diplodocid-like skull morphology appeared much earlier than previously thought.
Note Geografiche	Brazil, Southeast Region, Minas Gerais State, Coração de Jesus. Quirico Formation.