†Diadochoceras Hyatt 1900 (ammonite)
Cephalopoda - Ammonoidea - Parahoplitidae
Parent taxon: Parahoplitidae according to O. Renz 1982
Sister taxa: Deshayesitinae, Hypacanthoplites, Parahoplitinae, Parahoplitoides
Subtaxa: Diadochoceras nodosocostatum
Ecology: fast-moving nektonic carnivore