†family Arpaditidae Hyatt 1900 (ceratite)
Parent taxon: Trachycerataceae according to E. T. Tozer 1981
Sister taxa: Distichitidae, Heraclitidae, Noridiscitidae, Tibetitidae, Trachyceratidae
Subtaxa: none
Ecology: nektonic carnivore
Parent taxon: Trachycerataceae according to E. T. Tozer 1981
Sister taxa: Distichitidae, Heraclitidae, Noridiscitidae, Tibetitidae, Trachyceratidae
Subtaxa: none
Ecology: nektonic carnivore