Cephalopoda - Lituitida - Lamellorthoceratidae

Synonym: Lamellorthoceras Termier and Termier 1950

Parent taxon: Lamellorthoceratidae according to B. Kröger 2008

Sister taxon: Gorgonoceras

Subtaxa: Arthrophyllum crassus, Arthrophyllum vermiculare

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Type: Orthoceras crassus

Ecology: fast-moving nektonic carnivore