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Wikipedia / Menaspis

Menaspis is an extinct genus of holocephalian cartilaginous fish from the Permian period (Wuchiapingian stage). The only species in this genus is Menaspis armata.

References

Further reading

  • Aquagenesis: The Origin and Evolution of Life in the Sea by Richard Ellis

  • Rocks and Fossils: A Visual Guide (Visual Guides) by Robert R. Coenraads