Cephalopoda - Oncocerida - Polyelasmoceratidae
Parent taxon: Oncoceratida according to C. Teichert et al. 1964
Sister taxa: Acleistoceratidae, Agrioceras, Aktjuboceratidae, Alloceras, Almaloceras, Anonymoceras, Anthomorpha, Antonoceras, Aphyctoceras, Apioceras, Archiacoceratidae, Atomoceras, Balashovia, Barskoceras, Brevicoceratidae, Corbuloceras, Corysoceras, Cyrthocerataceae, Cyrtoceras, Devonocheilidae, Diestoceratidae, Doleroceras, Eocyrtoceras, Eudoceras, Gomphoceras, Graciloceratidae, Guangyuanoceras, Guangyuanoceroides, Hemiphragmoceratidae, Iowoceras, Jovellaniidae, Karoceratidae, Kophinoceras, Lychnoceras, Megaloceras, Mimolychnoceras, Mnemoceras, Nelimenia, Nothoceratidae, Oligoceras, Oncoceratidae, Oonoceratidae, Oratoceras, Pachtoceras, Poterioceratidae, Pseudobrevicoceras, Pyramidoceras, Ramussenoceras, Rutoceratoidea, Spanioceras, Sycoceras, Torquatoceras, Trigonodema, Trimeroceratidae, Tripleuroceratidae, Valcouroceratidae, Wetherbyoceras, Xainzanoceras
Subtaxa: Codoceras Coelocyrtoceras Cyrtocheilus Danaoceras Evlanoceras Hipparionoceras Macrodomoceras Turoceras Wadeoceras
Type: Polyelasmoceras
Ecology: fast-moving nektobenthic carnivore
Distribution: