Fayettevilleidae

Fayettevilleidae is one of six families of the Neoglyphiocerataceae superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids. ...
Found on http://en.wikipedia.org/wiki/Fayettevilleidae
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