Rare Fosil of Sea Reptile

Alaska scientists have discovered the fossil of a rare, prehistoric marine reptile that is likely the most complete remnant of the creature ever found in North America.

The nearly complete fossilized skeleton is of a thalattosaur, a long-tailed sea creature that plied warm, shallow waters in the early days of dinosaurs and became extinct at the end of the Triassic period some 200 million years ago.

The discovery of the fossil, found during an extreme low tide along the shore of the Tongass National Forest, was announced this week by the Museum of the North at the University of Alaska, Fairbanks.

Unlike most thalattosaur discoveries, which are fossilized remnants of individual bones and bone fragments, this specimen appeared to be a nearly full skeleton.

"In North America, this may be the most articulated specimen that we have right now," Baichtal said.

Scientists excavated the fossil in June and have been studying it to determine whether it represents a previously unknown species.

There are only about a dozen full thalattosaur specimens in the world, Baichtal said. "So the probability of this being something that wasn't seen before is probably pretty high," he said.

The find is likely the most northern discovery as well, Baichtal said. The fossil was found near the Tlingit Indian village of Kake in southeast Alaska.

Other thalattosaur discoveries have been made in British Columbia, Canada, as well as in Nevada and the Alps, though the best finds have been made in China, he said.

Posted in: Tech