Cephalopoda - Ammonitida - Polyptychitidae

Alternative spelling: Euryptychites

Parent taxon: Polyptychites according to P. Alsen 2006

Sister taxa: Polyptychites (Amundiptychites), Polyptychites (Astieriptychites), Polyptychites (Polyptychites), Polyptychites (Primitiviptychites), Polyptychites (Siberiptychites), Polyptychites balkwilli, Polyptychites canadensis, Polyptychites hapkei, Polyptychites tschekanovskii

Subtaxa: Polyptychites (Euryptychites) copiocostatus, Polyptychites (Euryptychites) diplotomus, Polyptychites (Euryptychites) gravesiformis, Polyptychites (Euryptychites) laevis, Polyptychites (Euryptychites) latissimus, Polyptychites (Euryptychites) molsbergensis, Polyptychites (Euryptychites) pateraeformis, Polyptychites (Euryptychites) roemeri, Polyptychites (Euryptychites) rubricosus, Polyptychites (Euryptychites) subcoronatus, Polyptychites (Euryptychites) traillensis

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Type: Olcostephanus latissimus

Ecology: fast-moving nektonic carnivore