Cephalopoda - Orthoceratoidea

Parent taxon: Orthoceratoidea according to B. Kröger and D. H. Evans 2011

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

Subtaxa: Polymeridae, Rangeroceratidae, Troedssonellidae

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Ecology: fast-moving nektonic carnivore