Seismosaurus

Seismosaurus was an enormous, long-necked, whip-tailed, small-headed dinosaur. It measured about 130-170 feet (39-52 m) long and was roughly 18 feet (5.5 m) tall (measured from the ground to the top of the shoulder). may have weighed about 30 tons (roughly 60,000 pounds). It was among the longest land animals that ever lived. Seismosaurus' nostrils were at the top of its tiny head. Its small mouth had peg-like teeth, but only in the front of the jaws. Its front legs were shorter than its back legs, and all had elephant-like, five-toed feet. Its short legs may have helped stabilize this enormous dinosaur. One toe on each foot had a thumb claw, probably for protection. Its backbone had extra bones underneath it, which had bony protrusions running both forwards and backwards (chevron shaped), probably for support and extra mobility of its neck and tail. Seismosaurus' tail contained at least one unusual wedge-shaped vertebra that gave it a kink. It may have used this whip-like tail for protection.



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 * Seisma