Parent taxon: Conodonta according to B. H. Harlton 1933
Sister taxa: Acodina, Aldridgeodus, Aldridgeognathus, Amphigeisinidae, Ancidontus, Ancyrogondolella, Apteracontiodus, Belodellida, Bengtsonella, Branmehla, Chengyuania, Coleodontidae, Costiconus, Dasytodus, Diaphanodus, Dischidognathus, 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, Polyplacognathida, Prioniodontida, Protopanderodontida, Pseudobelodella, Rexroadus, Rhynchognathodus, Rotundoconus, Sagittodontus, Scandodus, Silurognathus, Spathognathodus, Tardogondolella, Trichonodella, Youngquistognathus, Zygognathus
Subtaxa: Distacodus
Ecology: nektonic carnivore
Distribution:
• Carboniferous of United States (1: Oklahoma collection)
• Silurian of Morocco (1), United States (3: Missouri), Western Sahara (4)
• Whiterockian of United States (1: Nevada)
• Dawan of China (1)
• Arenig of China (1)
• Ordovician of the Russian Federation (3), Spain (1), United States (5: Nevada, New York)
• Tremadoc of China (4)
Total: 25 collections including 26 occurrences