Alternative spelling: Orthoceras (Cycloceras)
Synonym: Perigrammoceras Foerste 1924
Parent taxon: Orthocerida according to C. Teichert et al. 1964
See also Flower 1962, Gordon 1964 and Reed 1944
Sister taxa: Acrosphaerorthoceras, Aptychopsis, Arionoceratidae, Arterioceras, Badouceras, Baltoceratidae, Bogoslovskya, Brachycycloceratidae, Chicagooceras, Cornuella, Cryptocycloceras, 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, Allumettoceratidae, Choanoceratidae, Cycloceratidae, Michelinoceratidae, Striatoceratidae, Eskimoceratidae, Engorthoceratidae
Subtaxa: Cycloceras hsiangtanense Cycloceras laevigatum Cycloceras olorus Cycloceras waageni
Ecology: nektonic carnivore
Distribution:
• Permian of Bosnia and Herzegovina (1 collection), China (1), Iran (1)
• Chokierian of the United Kingdom (1)
• Carboniferous of Kazakhstan (1), the United Kingdom (6), United States (4: Arizona, Arkansas, Oklahoma)
• Devonian of Morocco (1)
• Silurian of the Czech Republic (1), United States (1: Wisconsin)
• Arenig of China (1)
• Ordovician of Canada (2: Nunavut), China (5), North Korea (1)
Total: 27 collections including 31 occurrences
Specimen images are retrieved through the ePANDDA API.
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