Cephalopoda - Ammonitida

Alternative spelling: Haplocerina

Parent taxon: Ammonitida according to Z. Vašíček et al. 2023

See also Shevyrev 2006

Sister taxa: Ammonites, Ammonitina, Ancyloceratina, Ancylocerina, Cardiocerina, Olcostephanina, Perisphinctina, Protancyloceratina, Psilocerina, Stephanocerina

Subtaxa: Haploceratoidea

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Ecology: fast-moving nektonic carnivore

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