Amargasaurus had extremely long neck spines that likely supported a pair of skin sails or fleshy humps, unlike any other known sauropod. elaborate
Protoceratops nests containing fossilized eggs and even babies have been found, providing valuable insights into their reproductive behavior. elaborate
Torosaurus had the largest skull of any known land animal. elaborate
Ceratosaurus had a horn on its nose, and two smaller horns above its eyes, but its most distinctive feature was a prominent bony frill or crest along its neck and back. elaborate
Allosaurus had a unique, S-shaped neck, unlike the straighter necks of many other large theropods. elaborate
Archaeopteryx fossils show evidence of both reptilian teeth and feathered wings. elaborate