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Solenoceras Ammonite, double (BU792)

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Solenoceras sp.

Upper Cretaceous Maastrichtian

Black Mitten Member

Pierre Formation

Custer County, South Dakota USA

This is a very rare specimen with two Solenoceras on one piece of matrix. Solenoceras is a heteromorphic Ammonite in that it changes shape in the growth pattern. Solenoceras appears similar to a hairpin.

 

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