Cephalopoda - Ammonitida - Engonoceratidae

Full reference: A. Hyatt. 1903. Pseudoceratites of the Cretaceous. United States Geological Survey, Monograph 44:1-351

Parent taxon: Engonoceratidae according to L. G. Bulot 2010

Sister taxa: Engonoceras, Metengonoceras, Neolobites

Subtaxa: Protengonoceras gabbi, Protengonoceras planum

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Type: Engonoceras gabbi

Ecology: fast-moving nektonic carnivore