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stingrays and skates of today
Acrocanthosaurus (meaning "high-spine lizard" because of the spikes growing out of its spine) was a fierce predator that was roughly 30-40 feet (9-12 m) long and weighed about 5
Reptiles are much more common and are more typically found during excavations
about 100-95 million years ago
Diadectes, reptile-like tetrapod Skull Alamosaurus stingrays and skates of todayDiadectes was a genus of large, very reptile like tetrapods that lived during the Early Permian. It is one of the very first herbivorous tetrapods, and also one of the first fully terrestrial animals to attain large size. It was a heavily built animal, 1. 5 to 3 meters long, with a thick boned skull, heavy vertebrae and ribs, massive limb girdles and short, robust limbs. The nature of the limbs and vertebrae clearly indicate a terrestrial animal. Its
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