Myalina subquadrata

Geological Range

Missourian to Virgilian; Extinct.

Texas to Nebraska.

Virgilian: Auburn Shale (OK); Calhoun Shale (KS); Emporia Limestone (OK); Graham Formation (Wayland Shale Member) (TX); Janesville Shale (Five Point Limestone Member) (KS); Lecompton Limestone (KS); Oread Formation (Kereford Limestone Member) (MO); Scranton Shale (Cedar Vale Shale Member) (KS); Severy Shale (KS); Stotler Limestone (Grandhaven Limestone Member) (KS); Stotler Limestone (Dry Shale Member) (KS); Stotler Limestone (Dover Limestone Member) (KS); Stranger Formation (Iatan Limestone Member) (KS); Stranger Formation (Vinland Shale Member) (KS); Stranger Formation (Weston Shale Member) (KS); Topeka Limestone (KS); Wood Siding Formation (KS); Wood Siding Formation (OK); Wood Siding Formation (Brownville Limestone Member) (OK); Wood Siding Formation (Grayhorse Limestone Member) (KS); Wood Siding Formation (Nebraska City Limestone Member) (KS); Zeandale Limestone (Wamego Shale Member) (KS); Zeandale Limestone (Wamego Shale Member) (NE)
Missourian: Drum Limestone (KS); Graford Formation (TX); Graford Formation (Brownwood Shale Member) (TX); Wyandotte Limestone (Farley Limestone Member) (KS)
Unknown Stage: Coal Measures (KS); Coal Measures (NE)