My previous post showed an Edestus shark in the Jurassic World cell phone game. I encountered another fossil shark in the game called a Helicoprion. This shark-like creature was one odd fish in that its fossil consists of a spiral of teeth. It was eventually determined the spiral was located in the lower jaw. As the fish grew the smaller teeth were pushed into the center of the lower jaw. Read more at the Wikipedia entry: https://en.wikipedia.org/wiki/Helicoprion
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| Image of Helicoprion bessonovi from J. Walther old book in public domain - source Wikipedia https://en.wikipedia.org/wiki/Helicoprion#/media/File:Helicoprion_Bessonovi2.jpg |
The real shark existed from the Permian to Triassic (290-250 million years ago).
