ammonites
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Annuloceras Murphy et al. 1995 (ammonite)

Cephalopoda - Ammonoidea - Aegocrioceratidae

PaleoDB taxon number: 14566

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

Sister taxa: Aegocrioceras, Bejucoceras, Hemicrioceras, Parancyloceras, Peltocrioceras, Simancyloceras

Subtaxa: Annuloceras summersi

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Type: Annuloceras summersi

Ecology: fast-moving nektonic carnivore