An ammonite of the genus Hoploscaphites taken by me on 3-13-05. This one is from the Pierre Seaway strata of South Dakota. Much of the original nacre (mother-of-pearl) shell is still intact. Ammonites are a type of extinct cephalopod related to nautiluses and squids.
Though filename says Holoscaphites, this is wrong. Its Hoploscaphites.
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move approved by: User:Deadstar This image was moved from Image:HoloscaphitesAmmonite.jpg An ammonite of the genus ''Hoploscaphites'' taken by me on 3-13-05. This one is from the Pierre Seaway strata of South Dakota. Much of the original nacre