Hyatt's original description (1903, p. 96-99) may be accessed here.
Stratigraphic Occurrences
Turonian
Carlile Shale (NM)
Chispa Summit Formation (TX)
Mancos Shale (NM)
Mancos Shale (Semilla Sandstone Member) (NM)
Unknown Stage
Eagle Ford Formation (TX)
Coilopoceras springeri from the Mancos Shale (Semilla Sandstone Member) of Sandoval County, New Mexico (KUMIP 150808).Coilopoceras springeri from the Mancos Shale (Semilla Sandstone Member) of Sandoval County, New Mexico (KUMIP 150807).