Once thought to have appeared in the Triassic, apparently ichthyosaurs decided to screw with paleontology and evolve way before the Permian mass-extinction instead. The mass extinction that killed 90% of life on earth, and these guys were just chillin'.
https://www.sciencealert.com/oldest-ichthyosaur-known-to-science-discovered-on-remote-arctic-island
Good for them.
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