Cephalopoda - Oncocerida - Graciloceratidae
Parent taxon: Oncocerida according to B. Kröger and M. Aubrechtová 2019
See also Crick 1981, Kröger 2007 and Kröger et al. 2009
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, Guangyuanoceras, Guangyuanoceroides, Hemiphragmoceratidae, Iowoceras, Jovellaniidae, Karoceratidae, Kophinoceras, Lychnoceras, Megaloceras, Mimolychnoceras, Mnemoceras, Nelimenia, Nothoceratidae, Oligoceras, Oncoceratidae, Oonoceratidae, Oratoceras, Pachtoceras, Polyelasmoceratidae, Poterioceratidae, Pseudobrevicoceras, Pyramidoceras, Ramussenoceras, Rutoceratoidea, Spanioceras, Sycoceras, Torquatoceras, Trigonodema, Trimeroceratidae, Tripleuroceratidae, Valcouroceratidae, Wetherbyoceras, Xainzanoceras
Subtaxa: Eorizoceras Graciloceras Isbergoceras Kundoceras Leonardoceras Piersaloceras Pomerantsoceras Porkunioceras Ringoceras
Ecology: fast-moving nektobenthic carnivore
Distribution: