👉 Dinosauria is a group of animals that includes all dinosaurs, which are known for their large size, powerful jaws, and sharp teeth. These creatures were the last members of the group and evolved in a diverse range of environments, from land to water. Some examples include trilobites (which are tiny, soft-bodied animals), sauropods (large herbivores with long necks and powerful jaws), and theropods (large carnivorous dinosaurs).