Gastropods

Late Pennsylvanian of Kansas

Top--Gastropods, genus Bellerophon, from the Drum Limestone, Kansas City Group of the Missourian Stage (306.5-305.5 million years old). Photograph courtesy the Kansas Geological Survey.

Bottom--Gastropods assigned to the genus Hypselentoma. From the upper Pennsylvanian Stanton Limestone, Douglas Group of the Virgilian Stage--303 to 301 million years old. Photograph courstesy the Kansas Geological Survey.

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