Parent taxon: Oncocerida according to B. Kröger 2008
Sister taxa: Acleistoceratidae, Agrioceras, Aktjubocheilus, Alloceras, Almaloceras, Anonymoceras, Anthomorpha, Antonoceras, Aphyctoceras, Apioceras, Archiacoceratidae, Atomoceras, Balashovia, Calchasiceras, Corbuloceras, Corysoceras, Cyrtoceras, Dalecarlioceras, Diestoceratidae, Doleroceras, Edenoceras, Eocyrtoceras, Eudoceras, Gomphoceras, Graciloceratidae, Guangyuanoceras, Guangyuanoceroides, Gyroceras, Hemibeloitoceras, Hemiphragmoceratidae, Hiregiroceras, Iowoceras, Irinites, Jovellaniidae, Kallholnoceras, Karoceratidae, Kijoceras, Kophinoceras, Leonardoceras, Lychnoceras, Megaloceras, Meloceras, Mimolychnoceras, Mnemoceras, Nelimenia, Neoceras, Nothoceratidae, Oligoceras, Oncoceratidae, Oonoceratidae, Oratoceras, Pachtoceras, Phthanoncoceratidae, Polyelasmoceratidae, Poterioceratidae, Pseudobrevicoceras, Pyramidoceras, Ramussenoceras, Rhomboceras, Spanioceras, Sycoceras, Talattoceras, Torquatoceras, Trigonodema, Trimeroceratidae, Tripleuroceratidae, Tshingizoceras, Valcouroceratidae, Wetherbyoceras, Xainzanoceras
Subtaxa: Aletoceras, Anglicornus, Blastocerina, Brevicoceras, Cerovoceras, Eleusoceras, Exocyrtoceras, Foersteoceras, Gonionaedyceras, Gyronaedyceras, Micronoceras, Mitroceras, Naedyceras, Ovoceras, Oxygonioceras, Stereotoceras, Verticoceras, Wissenbachia
Type: Brevicoceras
Ecology: fast-moving nektobenthic carnivore