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 ceratitoides, Arnioceras fieldingiceroides, Arnioceras insolitum, Arnioceras miserabile, Arnioceras nevadanum, Arnioceras paucicostum, Arnioceras rejectum, Arnioceras robustum, Arnioceras semicostatum, Arnioceras speciosum, Arniotites vancouverensis
Ecology: fast-moving nektonic carnivore