Helicoprion sp. - fossil shark tooth whorl from the Permian of Idaho, USA. (IMNH, Idaho Museum of Natural History, Idaho State University)
This Helicoprion fossil shark tooth whorl from the Permian was found in Idaho, USA.
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Helicoprion bessonovi - edestid "shark" from Early Permian (Artinskian) of the Ural region. The Helicoprion had a whorl of teeth embedded in its lower jaw.
Helicoprion bessonovi was a shark-like fish from Early Permian. The Helicoprion had a whorl of teeth embedded in its lower jaw.
Prehistoric Sharks - Helicoprion
The Helicoprion has a whirl of teeth in its lower jaw.
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