similar to a modern crocodile but with a more upright posture

allowing them to efficiently utilize their diet

Las plumas que se han encontrado en los fósiles de Yutyrannus indican que tenía un pelaje primitivo compuesto por plumas primitivas filamentosas

approximately 45 million years ago

Allosaurus fragilis Variant:Primed similar to a modern crocodileAllosaurus (A. fragilis, 'Different lizard') was the most common predatory theropod of the Kimmeridgian and Tithionian Age of the Upper Jurassic and the most dangerous as well. The Allosaurus had a large and robust head with serrated, sharp and curved teeth of between 5 10 cm, which allowed it to tear the flesh of its prey. It also had muscular arms with three fingers with claws up to 15 cm long, which helped it hold onto its prey. Its tail was long