Xiphactinus audax

Geological Range

Aptian to Maastrichtian

Alabama to Texas to Montana

Campanian: Bearpaw Shale (Upper) (MT) [Campanian]; Niobrara Formation (KS); Ozan Formation (TX); Pierre Shale (NM); Pierre Shale (SD) [Campanian]; Pierre Shale (WY) [Campanian]
Santonian: Austin Chalk Formation (TX); Niobrara Formation (Smoky Hill) (KS)
Coniacian: Ector Chalk (TX); Niobrara Formation (Smoky Hill Member) (KS)
Turonian: Carlile Shale (KS); Carlile Shale (Fairport Member) (KS); Carlile Shale (UT); Eagle Ford Shale (TX); Greenhorn Limestone (KS); Greenhorn Limestone (Jetmore Chalk Member) (KS)
Cenomanian: Greenhorn Limestone (CO); Greenhorn Limestone (Lincoln Mbr) (CO); Greenhorn Limestone (KS); Greenhorn Limestone (Lincoln Shale Member) (KS)
Aptian: Burro Canyon Formation (UT) [Aptian to Cenomanian]
Unknown Stage: Benton Shale (CO); Carlile Shale (Blue Hill Mbr) (KS); Carlile Shale (Fairport Mbr) (KS); Mancos Shale (CO); Mooreville Formation (AL); Montana Formation (MT); Montana Formation (WY); Mowry Shale (WY); Niobrara Formation (CO); Niobrara Formation (Smoky Hill Mbr) (KS); Niobrara Formation (NM); Pierre Shale (CO); Pierre Shale (SD)