Fossil of Priscomyzon Hatchling Showing Yolk Sac and Large Eyes (IMAGE)

Canadian Museum of Nature

Fossil of Priscomyzon Hatchling Showing Yolk Sac and Large Eyes

Caption

Fossil of the hatchling of Priscomyzon, from the Late Devonian around 360 million years ago. The hatchling is already equipped with large eyes and toothed sucker, which in modern lampreys only develop in adults. (The Canadian 25-cent coin offers a size comparison for the tiny fossil).

Credit

Tetsuto Miyashita

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