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an amphibian
Spinosaurus means "spine lizard
Anatomy: Eremotherium had peg-like teeth
in many Paleozoic and Mesozoic settings entire carbonate shelves were composed predominantly of crinoidal remains
Megalonyx jeffersonii, ground sloth Arm & Hand Stegosaurus an amphibianLeft ulna, radius and hand of Megalonyx jeffersonii. 33 inches long with 13 inch hand width Megalonyx jeffersonii Jefferson Ground Sloth West Virginia State Fossil President, Thomas Jefferson, scientifically described fossil bones given to him by saltpeter miners found in a Monroe County cave in 1797. Jefferson thought they were the claws of a giant cat. In 1799 Casper Wistar re described the bones as a new species of extinct giant ground sloth and
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