Cawtoniceras
Species
Cawtoniceras whiteavesi Reeside, 1919
Occurrence: Redwater Shale Member in Wyoming; Swift Formation in Montana; also from Lillooet area, British Columbia
Reference: Imlay, 1982
Cawtoniceras whiteavesi
Photograph from Imlay, 1982
Cawtoniceras plattense Reeside, 1919
Known only from the holotype
Occurrence: Redwater Shale Member in Wyoming
Formerly called Cardioceras (Maltoniceras) plattense
Reference: Imlay, 1982
Cawtoniceras plattense
Photograph from Imlay, 1982
Cawtoniceras sundancense Reeside, 1919
Occurrence: Redwater Shale Member in Wyoming; Swift Formation in Montana
Formerly called Cardioceras (Maltoniceras) sundancense
Reference: Imlay, 1982
Cawtoniceras sundancense
Photograph from Imlay, 1982
Cawtoniceras reddomense Imlay, 1982
Differs from C. (M.) sundancense by its stouter whorl cross-section, a lower less serrated keel, weaker secondary ribs, and more numerous tertiary ribs.
Occurrence: Swift Formation of Pryor Mountains in Montana
Formerly called Cardioceras (Maltoniceras?) reddomense
Reference: Imlay, 1982
Cawtoniceras reddomense
Photograph from Imlay, 1982
