Cephalopoda - Dissidocerida - Geisonoceratidae
Parent taxon: Geisonoceratidae according to R. E. Crick 1981
See also Sepkoski 2002, Sweet 1958 and Teichert et al. 1964
Sister taxa: Angeisonoceras, Columenoceras, Geisonoceras, Geisonocerina, Harrisoceras, Joachimoceras, Jonesoceras, Nilssonoceras, Ordogeisonoceras, Striacoceras, Temperoceras, Ugooloceras, Virgoceras
Subtaxa: Protokionoceras fessicancellatum Protokionoceras strandi
Ecology: fast-moving nektonic carnivore
Distribution:
• Devonian of United States (2: Ohio collections)
• Silurian of Canada (1: Quebec), China (1), Japan (1), United States (7: New York, Wisconsin)
• Ordovician of Canada (1: Ontario), Norway (8)
Total: 21 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.