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The fossil of the skull belonging to the extinct Coccocephalus wildi is a biologically active fish: Anatomy of the brain case
The fossil of the skull belonging to the extinct Coccocephalus wildi was found in a coal mine in England more than a century ago, according to researchers of the study published in the journal Nature on Wednesday.
It took us awhile to be sure that it was a brain. Aside from being just a preservational curiosity, the anatomy of the brain in this fossil has big implications for our understanding of brain evolution in fishes,” she added.
The braincase created a chemical micro-environment around the brain that could have helped to replace soft tissue with dense mineral that would maintain the fine details of the brain.
“This is such an exciting and unanticipated find,” study coauthor Sam Giles, a vertebrate paleontologist and senior research fellow at the University of Birmingham, told CNN Thursday, adding that they had “no idea” there was a brain inside when they decided to study the skull.
The researchers claim that C. wildi was a large, long fish that ate insects and small aquatic creatures in an estuary, and was probably 6 to 8 inches long.
“This indicates that the telencephalon configuration seen in living ray-finned fishes must have emerged much later than previously thought,” lead study author Rodrigo Tinoco Figueroa, a doctoral student at the University of Michigan’s Museum of Paleontology, said.