Cephalopoda - Orthoceratoidea

Parent taxon: Orthocerataceae according to C. Teichert et al. 1964

Sister taxa: Brachycycloceratidae, Dissidocerida, Offleyoceratidae, Orthocerida, Paraphragmitidae, Slemmestadoceras

Subtaxa: Braulioceras, Cartersoceras, Centroonoceras, Glenisteroceras, Leptoplatophrenoceras, Murrayoceras, Sactorthoceras, Scipioceras, Sigmocycloceras, Wennanoceras, Wolungoceras

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Ecology: fast-moving nektonic carnivore