What animals lived in America 150 million years ago?

Around 150 million years ago, during the Late Jurassic period, North America was home to a diverse array of dinosaurs, including large herbivores like the sauropods (e.g., Apatosaurus) and carnivores such as Allosaurus. Additionally, early mammals, small reptiles, and various marine creatures, including ammonites and ichthyosaurs, inhabited the region. The landscape was characterized by lush vegetation, which supported these ecosystems.