Cephalopoda - Ammonoidea

Parent taxon: Protancyloceratoidea according to J. Klein et al. 2007

Sister taxon: Protancyloceratidae

Subtaxa: Aegocrioceras, Annuloceras, Bejucoceras, Hemicrioceras, Parancyloceras, Peltocrioceras, Simancyloceras

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Ecology: fast-moving nektonic carnivore