Cephalopoda - Orthocerida - Brachycycloceratidae
Parent taxon: Orthoceratida according to S. Niko and R. H. Mapes 2009
See also Teichert et al. 1964
Sister taxa: Acrosphaerorthoceras, Aptychopsis, Arionoceratidae, Arterioceras, Badouceras, Baltoceratidae, Bogoslovskya, 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, Sphaerorthoceratidae, Sphaerortoceratidae, Subspyroceras, Tartaroceras, Tretoceras, Tripteroceratidae, Trispectes, Uralharuspex, Vericeras, Zhuralevia, Striatoceratidae, Cycloceratidae, Michelinoceratidae, Engorthoceratidae, Eskimoceratidae, Choanoceratidae, Allumettoceratidae
Subtaxa: Brachycycloceras
Ecology: nektonic carnivore
Distribution:
• Permian of Japan (1 collection), Oman (1), Pakistan (3), Tunisia (1), United States (1: New Mexico)
• Carboniferous of Kazakhstan (1), the United Kingdom (4), United States (23: Arkansas, Illinois, New Mexico, Pennsylvania, Texas)
Total: 35 collections including 39 occurrences