The accidental discovery revealed the oldest brain found in any vertebrate.
was found on the roof of the Mountain Fourfoot coal mine in Lancashire, England. It was first scientifically described in 1925. Today, scientists uncovered the oldest example of a well-preserved vertebrate brain from the fish.
The fossilized skull of Coccocephalus wildi, an early ray-finned fish that swam in an estuary 319 million years ago.The CT-scanned brain analyzed is that of Coccocephalus wildi, an early ray-finned fish that swam in an estuary and likely dined on small crustaceans, aquatic insects, and cephalopods, a group that today includes squid, octopuses, and cuttlefish. Ray-finned fishes have backbones and fins supported by bony rods called rays.
Post-death, the soft tissues of the fish's brain and cranial nerves were replaced with a dense mineral that preserved their 3D structure.
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