NEW YORK, N.Y. — June 11, 2014 — New fossils are providing critical details about one of the earliest known fishes, and researchers say that helps show how jaws evolved in animals that have backbones.
The fish is called Metaspriggina (me-tuh-SPRIG'-ih-nuh). Researchers say it grew about 2 inches long and lived widely in North America some 515 million to 500 million years ago.
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