Helicoprion
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- New Investigations on Helicoprion from the Phosphoria Formation of South-East Idaho, U.S.A
- Helicoprion, Lived in the Deep Sea and Only Produced Some Great Fossils of This Species Which Has Greatly Helped in Occasionally Approached the Coast
- Database of Bibliography of Living/Fossil
- Sharks By: Caroline Bell
- Sandy Roberts Earth Sciences Scholarship Features FOSSIL Project Bizarre ?Coprolite from Morocco Bitten Bezoar