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Fresh Fossil Evidence Of Eye Forerunner Uncovered

Achilles Tang

By Achilles Tang,
in General Reefkeeping_

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Achilles Tang

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Ancient armored fish fossils from Australia present some of the first definite fossil evidence of a forerunner to the human eye. Researchers analyzed the fossilized remains of 400-million-year-old Devonian placoderms -- jawed ancestors of modern fish whose bodies were protected by thick bony armor. Palaeobiologists discovered that unlike all living vertebrate animals -- which includes everything from the jawless lamprey fish to humans -- placoderms had a different arrangement of muscles and nerves supporting the eyeball -- evidence of an "intermediate stage" between the evolution of jawless and jawed vertebrates.

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