Parent taxon: Conodonta according to B. H. Harlton 1933
Sister taxa: Acodina, Aldridgeodus, Aldridgeognathus, Amphigeisinidae, Ancidontus, Ancyrogondolella, Apteracontiodus, Belodellida, Branmehla, Chengyuania, Coleodontidae, Costiconus, Dasytodus, Diaphanodus, Dischidognathus, Dolborodina, Enantiognathus, Eofalodus, Euconodonta, Euconodonta, Euconodonta, Fahraeosodus, Falcodus, Gagievodus, Gobduntaulepis, Heterdontoides, Hindeodella andrusovi, Iowagnathus, Llandoverygnathus, Lundodus, Minimodus, Nasusgnathus, Noixodontus, Omanognathus, Oslodus, Ozarkodinida, Palmatodella, Panderodontida, Pandorinella, Paraconodontida, Parvigondolella, Pollognathus, Polygnathida, Polyplacognathida, Prioniodontida, Protopanderodontida, Pseudobelodella, Rexroadus, Rhynchognathodus, Rotundoconus, Sagittodontus, Silurognathus, Spathognathodus, Tardogondolella, Tokognathus, 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)
• Arenig of China (1)
• Dawan of China (1)
• Ordovician of China (4), the Russian Federation (3), Spain (1), United States (5: Nevada, New York)
Total: 25 collections including 26 occurrences