It is one of the largest known pterosaurs

Most notable features of Stegosaurus stenops:Bony plates: This dinosaur had a series of bony plates along its back

adapted for aquatic life

Polacanthus had more flexible armor

which lived in the late Cretaceous period

Kelenken Variant:Unprimed It is one of theKelenken (K. guillermoi `Terror Bird) is a genus of phorusrhacidae, an extinct group of large predatory birds that lived in the Middle Miocene to Neogene Epoch, about 15 million years ago, in what is now Argentina. Phororracids were large flightless birds with long hindlimbs, narrow pelvises, proportionately small wingspans, and huge skulls with a hooked beak and are thought to have been dominant land predators or scavengers in the Cenozoic. Kelenken