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Hoploscaphites (Ammonite), Pierre Shale, North Dakota.

$38.00 

Description

1.62" (4.12 cm) long Hoploscaphites (Ammonite) from the Pierre Shale of South Dakota. The Pierre Shale Dates to 73 to 70 Million Years Old.

Hoploscaphites is a species of Scapphite, which have the signature characteristic of having small spikes on the shell.