†family Plectoceratidae Hyatt in Zittel 1900 (nautiloid)
Parent taxon: Barrandeoceratida according to C. Teichert et al. 1964
Sister taxa: Apsidoceratidae, Barrandoceratidae, Lechritrochoceratidae, Nephriticeratidae, Uranoceratidae
Subtaxa: Plectoceras
Type: Plectoceras
Ecology: fast-moving nektobenthic carnivore