Orbiculoidea

Phylum: Brachiopoda-Inarticulata
Class: Lingulata
Order: Lingulide
Family: Discinidae
Genus: Orbiculoidea

Species
Information
Images

Species of Orbiculoidea present in the Pennsylvanian of the American Midcontinent

Orbiculoidea capuliformis

Orbiculoidea convexa

Orbiculoidea missouriensis

Orbiculoidea subtrigonalis

Geological Range

Morrowan to Virgilian; Extinct.

Paleogeographic Distribution

Texas to Ohio.

Stratigraphic Occurrences

Virgilian: Deer Creek Limestone (Ozawkie Limestone Member) (KS); Emporia Limestone (Reading Limestone) (KS); Graham Formation (TX); Graham Formation (Wayland Shale Member) (TX); Graham Formation (Gunsight Limestone Member) (TX); Graham Formation (Necessity Shale Member) (TX); Graham Formation (Jacksboro Limestone Member) (TX); Graham Formation (Finis Shale Member) (TX); Harpersville Formation (Waldrip Shale Member) (TX); Howard Formation (KS); Lawrence Formation (OK, KS); Lawrence Formation (Haskell Limestone Member) (KS); Lecompton Limestone (Spring Branch Limestone Member) (KS); Oread Limestone (Leavenworth Limestone Member) (KS); Tecumseh Shale (KS); Wood Siding Formation (Brownville Limestone Member) (OK, KS)
Missourian: Bonner Springs Shale (KS); Coffeyville Formation (OK); Dewey Formation (Quivira Shale Member) (MO); Drum Limestone (KS); Galesburg Shale (KS); Graford Formation (Brownwood Shale Member) (TX); Hertha Limestone (Mound City Shale Member) (KS); Iola Limestone (MO); Iola Limestone (Avant Limestone Member) (OK); Nellie Bly Formation (OK); Plattsburg Limestone (Hickory Creek Shale Member) (KS); Plattsburg Limestone (Merriam Limestone Member) (KS); Stanton Limestone (Eudora Shale Member) (OK, KS); Vilas Shale (KS); Wann Formation (OK); Wyandotte Limestone (Argentine Limestone Member) (KS); Wyandotte Limestone (Farley Limestone Member) (KS)
Desmoinesian: Altamont Limestone (KS); Boggy Formation (OK); Cabaniss Formation (KS); Cabaniss Formation (Chelsea Sandstone Member) (KS); Fort Scott Limestone (KS); Holdenville Shale (OK); Krebs Formation (KS); Labette Shale (KS); Millsap Lake Formation (Grindstone Creek Member) (TX); Savanna Formation (OK); Wewoka Formation (OK); Wetumka Formation (OK)
Atokan: Marble Falls Limestone (TX); McAlester Formation (OK); Pottsville Formation (Mercer Limestone Member) (OH)
Morrowan: Bloyd Shale (Brentwood Limestone Member) (AR, OK); Marble Falls Limestone (TX)