Found in China, the jawless bloodsucking fish fossils are ten times larger than any of their ancient kin.
Fossilized lampreys from the Jurassic period have surprised a team of paleontologists by their size and well-preserved feeding structures, indicating the creepy fish were already predatory 160 million years ago. Scientists recently identified two new lamprey species, Yanliaomyzon occisor and Yanliaomyzon ingensdentes, which translate to “killer” and “large teeth,” respectively.
The bodies of the animals are well-preserved, with their oral discs and biting structures being in particularly good condition, providing critical clues to the researchers about their position in the ancestral tree of lampreys. Y. occisor is just over two feet long and Y. ingensdentes is just under one foot long , making them smaller than modern sea lampreys, pacific lampreys, pouched lampreys, and Arctic lampreys, all of which have maximum lengths of more than two feet.
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