Pinna

Geological Range

Desmoinesian to Virgilian; Extinct.

Paleogeographic Distribution

Texas to Nebraska.

Stratigraphic Occurrences

Virgilian

Harpersville Formation (Waldrip Shale Member) (TX)

Lecompton Limestone (KS)

Oread Limestone (KS)

Missourian

Dennis Limestone (Winterset Limestone Member) (KS)

Drum Limestone (KS)

Iola Limestone (KS)

Plattsburg Limestone (Merriam Limestone Member) (KS)

Stanton Limestone (Stoner Limestone Member) (KS)

Desmoinesian

Carbondale Formation (KS)

Unknown Stage

Coal Measures (KS)

Coal Measures (MO)

Coal Measures (NE)

Coal Measures (TX)