Parent taxon: Conodonta according to S. A. Leslie 1997
See also Sweet 1988
Sister taxa: Acodina, Aldridgeodus, Aldridgeognathus, Amphigeisinidae, Ancidontus, Ancyrogondolella, Apteracontiodus, Belodellida, Bengtsonella, Branmehla, Chengyuania, Coleodontidae, Costiconus, Dasytodus, Diaphanodus, Dischidognathus, Distacodidae, Enantiognathus, Euconodonta, Euconodonta, Euconodonta, Fahraeosodus, Falcodus, Gagievodus, Gobduntaulepis, Heterdontoides, Hindeodella andrusovi, Iowagnathus, Llandoverygnathus, Lundodus, Minimodus, Nasusgnathus, Noixodontus, Omanognathus, Oslodus, Ozarkodinida, Palmatodella, Pandorinella, Paraconodontida, Parvigondolella, Polygnathida, Polyplacognathida, Prioniodontida, Protopanderodontida, Pseudobelodella, Rexroadus, Rhynchognathodus, Rotundoconus, Sagittodontus, Scandodus, Silurognathus, Spathognathodus, Tardogondolella, Trichonodella, Youngquistognathus, Zygognathus
Subtaxa: Cristodus Loxodus Panderodontidae Thrincodus
Ecology: nektonic carnivore
Distribution:
• Givetian of the Russian Federation (1 collection)
• Devonian of Australia (168), Austria (113), Bulgaria (5), Canada (12: Northwest Territories, Nunavut, Ontario, Yukon, Yukon Territory), France (1), Germany (5), Greece (2), Italy (23), Mongolia (2), Morocco (47), Poland (2), the Russian Federation (11), Spain (1), United States (24: Iowa, Minnesota, Nevada, Texas), Vietnam (1)
• Niagaran of Canada (3: Québec)
• Silurian to Devonian of Australia (73)
• Silurian of Argentina (1), Australia (138), Austria (36), Canada (313: British Columbia, Cape Manning, Cornwallis Island, Manitoba, Northwest Territories, Nunavut, Ontario, Quebec, Québec, Yukon, Yukon Territory), China (2), the Czech Republic (38), Estonia (140), Greece (1), Greenland (188), Ireland (1), Italy (40), Latvia (5), Lithuania (82), Malaysia (3), Mongolia (5), Norway (8), Poland (33), the Russian Federation (21), Sweden (272), Ukraine (5), the United Kingdom (187), United States (543: California, Georgia, Illinois, Indiana, Iowa, Kentucky, Missouri, Nevada, New York, Ohio, Oklahoma, Tennessee, Texas, Utah, Wisconsin)
• Whiterockian of Canada (4: British Columbia, Northwest Territories), United States (8: Nevada)
• Chazyan of United States (1: Tennessee)
• Arenig of Argentina (1), China (3)
• Ordovician to Devonian of Canada (16: Nunavut)
• Ordovician to Silurian of Canada (58: Nunavut, Québec)
• Ordovician of Argentina (12), Australia (14), Austria (5), Canada (169: British Columbia, Cape Manning, Cornwallis Island, Manitoba, Newfoundland, Northwest Territories, Nunavut, Ontario, Québec), China (56), Estonia (5), Germany (1), Greenland (40), Ireland (1), Italy (1), Kazakhstan (1), Lithuania (1), Malaysia (23), Mongolia (2), New Zealand (4), Poland (14), the Russian Federation (48), Spain (1), Svalbard and Jan Mayen (5), Sweden (26), Thailand (6), the United Kingdom (2), United States (102: Alaska, Iowa, Minnesota, Missouri, Nevada, New Mexico, New York, Oklahoma, Utah, Wyoming)
• Tremadoc of Argentina (1), Canada (3: British Columbia), the Russian Federation (4), South Korea (3)
• Ibexian of United States (1: New York)
• Cambrian of Canada (1: Nunuvat)
Total: 3199 collections including 5233 occurrences