Parent taxon: Orthocerida according to B. Kröger 2008
Sister taxa: Aptychopsis, Arionoceratidae, Arterioceras, Badouceras, Baltoceratidae, Bogoslovskya, Brachycycloceratidae, Chicagooceras, Cornuella, Cryptocycloceras, Cycloceras, Dictyoceras, Esopoceras, Folioceras, Garryoceras, Heloceras, Jangziceras, Joldagiroceras, Kentronites, Kionoceratidae, Loxoceras, Mericoceras, Molossus, Murchisoniceras, Naivs, Nebroceras, Neorthoceras, Orthoceratidae, Orthoceratina, Orthodochmiocerataceae, Paradnatoceras, Paramooreoceras, Plicatoceras, Podoliceras, Proteoceratidae, Pseudorthocerataceae, Pseudorthoceratoidea, Pythonoceras, Rhabdites, Rhipsites, Sactorthoceratidae, Sannionites, Sichuanaceras, Sichuanoceratidae, Sphaerortoceratidae, Subspyroceras, Tartaroceras, Tretoceras, Tripteroceratidae, Trispectes, Uralharuspex, Vericeras, Zhuralevia, Eskimoceratidae, Michelinoceratidae, Choanoceratidae, Striatoceratidae, Allumettoceratidae, Engorthoceratidae, Cycloceratidae
Subtaxa: Akrosphaeorthoceras Akrosphaerorthoceras Hemicosmorthoceras Iwakiella Parasphaerorthoceras Plagiostomoceras Sphaerorthoceras
Type: Sphaerorthoceras
Ecology: nektonic carnivore
Distribution:
• Permian of Japan (1 collection)
• Devonian of Australia (1), Germany (1), Italy (2), Kyrgyzstan (1), Morocco (9), Poland (1)
• Silurian to Devonian of Italy (2)
• Silurian of Austria (4), Czechia (1), Italy (13), Morocco (2), United States (2: Wisconsin)
Total: 40 collections including 110 occurrences