Name:
Hoploscaphites cheyennensis
Age: Cretaceous
Formation: Fox Hills Formation
Location: South Dakota
Size: Ammonite is 3.2 inches across!
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This is a beautiful ammonite fossil. It is a colorful Hoploscaphites cheyennensis from the Cretaceous of South Dakota. This type of ammonite has numerous ribs and many distinct large nodes. The keel is quite flat, with a row of prominent nodes on both sides. These ammonite is very 3-dimensionally preserved and exhibits fine detail. The cephalopod is extremely inflated and 3-D, and the reddish-brown iridescent nacre is beautifully displayed. The ammonite is wonderfully preserved and free of most of its matrix - the other side also displays beautifully. This is a large, colorful Hoploscaphites cheyennensis from the Fox Hills Formation.
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