Full reference: S. Stouge and G. Bagnoli. 1999. The suprageneric dassifìcation of some Ordovician prioniodontid conodonts. Bollettino della Società Paleontologica Italiana 37(2-3):145-158
Parent taxon: Conodonta according to S. Stouge and G. Bagnoli 1999
Sister taxa: Acodina, Aldridgeodus, Aldridgeognathus, Amphigeisinidae, Ancidontus, Ancyrogondolella, Apteracontiodus, Belodellida, Bengtsonella, Branmehla, Chengyuania, Coleodontidae, Costiconus, Dasytodus, Diaphanodus, Dischidognathus, Distacodidae, Dolborodina, Enantiognathus, Euconodonta, Euconodonta, Euconodonta, Fahraeosodus, Falcodus, Gagievodus, Gobduntaulepis, Heterdontoides, Hindeodella andrusovi, Iowagnathus, Llandoverygnathus, Lundodus, Minimodus, Nasusgnathus, Noixodontus, Omanognathus, Oslodus, Ozarkodinida, Palmatodella, Panderodontida, Pandorinella, Paraconodontida, Parvigondolella, Polygnathida, Prioniodontida, Protopanderodontida, Pseudobelodella, Rexroadus, Rhynchognathodus, Rotundoconus, Sagittodontus, Silurognathus, Spathognathodus, Tardogondolella, Trichonodella, Youngquistognathus, Zygognathus
Subtaxa: Cahabagnathidae
Ecology: nektonic carnivore
Distribution: there are no occurrences of Polyplacognathida in the database