Experts have uncovered the earliest known example of a fish with extra teeth deep inside its mouth—a 310-million-year-old fossilized ray-finned fish that evolved a unique way of devouring prey.

Living beings can evolve to lose biological structures due to potential survival benefits from such losses. For example, certain groups of ray-finned fishes show such regressive evolution—medakas, ...

Ray-finned fishes (Actinopterygii) represent the most speciose vertebrate group, encompassing deep evolutionary splits between archaic lineages such as Holostei and the vast radiation of Teleostei.

The fossilized skull of Coccocephalus wildi, an early ray-finned fish that swam in an estuary 319 million years ago. The fish is facing to the right, with the jaws visible in the lower right portion ...

The CT-scanned skull of a 319-million-year-old fossilized fish, pulled from a coal mine in England more than a century ago, has revealed the oldest example of a well-preserved vertebrate brain. The ...

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A 319-million-year-old fossilised fish, pulled from a coal mine in England more than a century ago, has revealed the oldest example of a well-preserved vertebrate brain. CT-scanning, where X-rays are ...

ANN ARBOR, MI - The world’s oldest brain is located in Ann Arbor, and it belonged to a fish from 319 million years ago. A University of Michigan-led study published Wednesday, Feb. 1, in the British ...