Isle of Wight fossil sheds light on enigmatic meat — eating dinosaurs

Invictibellatrix lived about 120 million years ago Tiger-sized predator was part of megaraptoran group It may have filled ecological niche akin to a hyena Invictibellatrix's fossil is a fragmented braincase By Will Dunham Oct 13 (Reuters) — The partial skull of a tiger-sized predator that prowled what is now the Isle of Wight off England's southern coast about 120 million years ago is giving scientists a better understanding of an enigmatic group of meat-eating dinosaurs known for running down prey and ripping them apart with massive hand claws. Researchers said the fossil belongs to a species they have named Invictibellatrix amberina, an early member of the lineage of Cretaceous Period carnivorous dinosaurs called megaraptorans. Invictibellatrix adds to the knowledge of skull anatomy among early megaraptorans and, being the first one known from Europe, helps show how the group spread globally. Invictibellatrix is one of the smallest megaraptorans. Based on fossils of closely related megaraptorans, the researchers estimated that Invictibellatrix was about 16 feet (5 meters) long, with the weight of a large tiger. Its body may have been covered in filament-like feathers, they said.