Wikipedia / Menaspis
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