Parent taxon: Goniatitida according to D. Korn and V. Hairapetian 2021
See also Arkell et al. 1957, Furnish et al. 2009, Gordon 1964, Korn 2006, Korn and Ghaderi 2016, Korn et al. 1999, Korn and Titus 2015, Leonova 1989, Leonova 2002, Leonova and Shilovsky 2014, Shevyrev 2006, Titus 1997, Titus 2000, Tongtherm et al. 2016 and Zhou 2017
Sister taxa: Adrianitina, Aphanites, Cyclolobina, Imitoceratidae, Osmanoceras, Prehoffmannia, Schuichengoceras, Terektites, Thallassoceras, Tornoceratina, Unquatornoceras
Subtaxa: Adrianitoidea Agathiceratoidea Cycloloboidea Dimorphoceratoidea Gastrioceratoidea Girtyocerataceae Goniatitidae Goniatitoidea Gonioloboceratoidea Marathonitoidea Neodimorphoceratoidea Neoglyphioceratoidea Neoicoceratoidea Nomismoceratoidea Pericycloidea Popanoceratoidea Schistoceratoidea Shumarditoidea Somoholitoidea Thalassoceratoidea
Ecology: fast-moving nektonic carnivore