Archelon U

Turtles appeared in the Triassic, but marine turtles like Archelon evolved in the Cretaceous. Archelon resembled a modern leatherback, but was twice as long.

Long neck was supported by 72 neck bones, or vertebrae— more than any other animal „

Long-necked plesiosaurs were common in Jurassic and Cretaceous oceans. The 46-ft 14-m) Elasmosaurus had the longest neck of all, at up to 16 ft (5 m) long. It may have used it to gather shellfish from the sea floor.

Long-necked plesiosaurs were common in Jurassic and Cretaceous oceans. The 46-ft 14-m) Elasmosaurus had the longest neck of all, at up to 16 ft (5 m) long. It may have used it to gather shellfish from the sea floor.

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