Cephalopoda - Ammonitida - Arietitidae
PaleoDB taxon number: 14579
Synonyms: Arniotites (no. 14580), Burkhardticeras Lopez 1967 (no. 257616), Eparnioceras Spath 1924 (no. 257614), Laevispirus Venturi and Nannarone 2002 (no. 257617), Melanhippites Crickmay 1928 (no. 257615)
Parent taxon: Arietitinae according to M. K. Howarth 2013
Sister taxa: Coroniceras, Guexiceras, Longziceras, Metarnioceras, Schreinbachites, Tmaegoceras, Vermiceras
Subtaxa: Arnioceras arnouldi, Arnioceras bodleyi, Arnioceras ceratitoides, Arnioceras fieldingiceroides, Arnioceras insolitum, Arnioceras miserabile, Arnioceras nevadanum, Arnioceras paucicostum, Arnioceras pseudoturneri, Arnioceras rejectum, Arnioceras robustum, Arnioceras semicostatum, Arnioceras speciosum, Arnioceras transitionis, Arniotites vancouverensis
Ecology: fast-moving nektonic carnivore