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Protospinax is an extinct genus of cartilaginous fish. Protospinax was a shark-like relative of modern rays, the 5-foot-long Protospinax lived in lagoons in southern Germany approximately 150 million years ago, during the Jurassic period.

DiscoveryEdit

ReferencesEdit

  • Paleo Sharks: Survival of the Strangest (Paleo) by Timothy J. Bradley

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