Mytiloides labiatus

Geological Range

Albian to Santonian

Texas to Montana

Santonian: Mesaverde Formation (NM)
Coniacian: Boquillas Formation (TX); Niobrara Formation (Fort Hays Member) (CO)
Turonian: Boquillas Formation (TX); Bridge Creek (CO); Britton Formation (TX); Carlile Shale (KS); Carlile Shale (Blue Hill Shale Member) (KS); Carlile Shale (Fairport Member) (KS); Chispa Summit Formation (TX); Fairport Formation (CO); Frontier Formation (WY); Greenhorn Limestone (KS); Greenhorn Limestone (Pfeifer Member) (KS); Mancos Shale (Cross Tongue Member) (NM); Mancos Shale (Semilla Sandstone Member) (NM); Montezuma Valley Formation (CO); Niobrara Formation (CO); Niobrara Formation (NM); Tropic Shale (UT)
Cenomanian: Bridge Creek (CO); Cone Hill Formation (MT); Greenhorn Limestone (KS); Greenhorn Limestone (Hartland Member) (KS); Greenhorn Limestone (Jetmore Chalk Member) (KS); Greenhorn Limestone (NM)
Albian: Sarten Sandstone (NM)
Unknown Stage: Carlile Shale (Blue Hill Mbr) (KS); Cody Shale (WY); Frontier Formation (UT); Gallup Sandstone (NM); Greenhorn Limestone (CO); Greenhorn Limestone (NE); Greenhorn Limestone (SD); Lewis Shale (NM); Mancos Shale (UT); Niobrara Formation (Smoky Hill Mbr) (KS)