Parent taxon: Ammonoidea according to D. Korn and M. N. Sudar 2016
See also Furnish et al. 2009, Kummel 1969, Leonova 2002, Sepkoski 2002, Titus 2000 and Tozer 1994
Sister taxa: Aequiloboidea, Agoniatitida, Ammonitida, Aptychus, Ceratitida, Clymeniida, Cornaptychus, Ellipsolithes, Epimayites, Eubranoceras, Farbesiceras, Forbescieras, Globites, Gomimonomeroceras, Goniatitida, Laevaptychus, Laevicornaptychus, Lenticeratidae, Lilinthiceras, Lytoceratida, Lytocerida, Medlicottiida, Orbulites, Pelagus, Phylloceratida, Phylloceratitida, Phyllocerida, Planulites, Praeglyphioceratida, Pronoritida, Proplanulitidae, Psiloceratida, Ptychoceratoidea, Punctaptychus, Rugaptychus, Sidetes, Spinaptychus, Tornoceratida, Tornocerida, Trachyceratina, Tropitoidea, Yokoyamaceras
Subtaxa: Medlicottiina Medlicottioidea Prolecanitina Prolecanitoidea Sageceratina
Ecology: fast-moving nektonic carnivore