Guarinisuchus munizi was a recently described (March 2008) dyrosaurid from the Paleocene Maria Farinha Formation deposits of North-eastern Brazil. The Dyrosaurids were a group of long-snouted marine crocodylomorphs that appeared during the Cretaceous and survived the K-T extinction, and known for rather fragmentary materials from South and North America and Africa. Dyrosaurids are thought to have briefly occupied the niche let vacant by the disappearance of the mesozoic metriorhynchids and mosasaurs. Guarinisuchus is to date the most complete representative of the south american dyrosaurids. Its size is small (3 meters) compared to the other members of the group.
Nice job Great to see this creature.
It's not related to Thoracosaurus, is it?
Thoracosaurus is more primitive, isn't it?
I guess so: Thoracosaurus appeared during the late Cretaceous, and lived in the Atlantic, what with fossils being found in both Holland and New Jersey, and died out during the early Eocene, I think.