Cephalopoda - Orthocerida - Proteoceratidae
Parent taxon: Proteoceratidae according to C. Teichert et al. 1964
See also Crick 1981, Flower 1962, Strand 1934 and Sweet 1958
Sister taxa: Archigeisonoceras, Baykonuroceras, Clothoceras, Cyrtactinoceras, Euorthoceras, Gangshanoceras, Gorbyoceras, Isorthoceras, Liulinoceras, Mesnaquaceras, Metephippiorthoceras, Monomuchites, Paraproteoceras, Proteoceras, Pseudeskimoceras, Pseudoliolinoceras, Stereospyroceras, Tofangoceras, Transorthoceras, Treptoceras, Ulmioceras
Subtaxa: Ephippiorthoceras dowlingi Ephippiorthoceras frognoeyense Ephippiorthoceras frognoyense Ephippiorthoceras plicatuloides
Ecology: nektonic carnivore
Distribution:
• Silurian of Canada (1: Quebec collection)
• Ordovician of Canada (20: Manitoba, Northwest Territories, Nunavut, Ontario, Quebec, Saskatchewan), Greenland (1), Norway (4), United States (14: Colorado, Illinois, Iowa, Wisconsin, Iowa, Iowa, Minnesota, Minnesota, South Dakota, Wyoming)
Total: 40 collections including 46 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.