Name:
Placenticeras meeki
Age: Cretaceous
Formation: Pierre Shale Formation
Location: South Dakota
Size: Ammonite is 7.6 inches across
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This is a great specimen of one of the most desirable ammonites from the United States. This is a beautiful Placenticeras meeki from the Cretaceous of South Dakota. This ammonite is characterized by having broad convex, nearly unornamented flanks and smooth venter. This disc-shaped ammonite has a very narrow, flat keel. The outer shell has been removed from the ammonite to display the fabulous suture pattern of the cephalopod. The white suture pattern contrasts beautifully with the dark ammonite. The cephalopod is fully free of matrix, and both sides display beautifully. This is a very fine specimen of Placenticeras meeki from South Dakota. (White streak is in the photo, not on the fossil.)
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