Parent taxon: Prioniodontida according to P. C. J. Donoghue et al. 2008
Sister taxa: Acodontidae, Anticostiodus, Balognathidae, Balognathoidea, Cyrtoniodontidae, Distomodontidae, Histiodella, Multioistodontidae, Oepikodus, Oistodontidae, Paracordylodontidae, Paracordylodus, Periodontidae, Phragmodus, Plectodinidae, Prioniodinida, Prioniodontacea, Rhipidognathidae, Sagittodontina, Strachanognathidae
Subtaxa: Apatognathus Aphelognathus Chirognathus Erika Erismodus Erraticodon Hibbardella Kladognathus Oulodus
Ecology: nektonic carnivore
Distribution:
• Triassic of Bosnia and Herzegovina (3 collections), Greece (17), Hungary (3), Israel (1), New Zealand (1), Serbia and Montenegro (1), United States (1: Nevada)
• Carboniferous of Germany (1), India (1), Mexico (3), the Russian Federation (4), the United Kingdom (13), United States (15: California, Iowa, Missouri, Ohio, Oklahoma, Pennsylvania, Utah, Virginia, Wyoming)
• Devonian to Triassic of Greece (1)
• Devonian of Australia (39), Austria (36), Belgium (1), Canada (2: Ontario, Yukon), China (9), the Czech Republic (6), Greece (1), Italy (25), Morocco (4), Myanmar (1), Portugal (1), the Russian Federation (2), United States (13: California, Nevada, Texas), Vietnam (1), Western Sahara (2)
• Niagaran of Canada (1: Québec)
• Silurian to Devonian of Australia (7), Italy (1)
• Silurian of Australia (3), Austria (12), Bulgaria (3), Canada (89: British Columbia, Cornwallis Island, Manitoba, Nunavut, Ontario, Quebec, Québec, Yukon, Yukon Territory), the Czech Republic (4), Estonia (98), Greece (3), Greenland (20), Italy (25), Latvia (3), Lithuania (22), Malaysia (1), Morocco (3), Norway (4), Poland (12), the Russian Federation (18), Sweden (198), Ukraine (9), the United Kingdom (30), United States (120: California, Indiana, Iowa, Kentucky, Missouri, New York, Ohio, Oklahoma, Wisconsin), Western Sahara (5)
• Whiterockian of Canada (4: British Columbia, Northwest Territories), United States (5: Nevada)
• Dawan of China (1)
• Arenigian of United States (1: Alaska)
• Arenig of Argentina (3), China (3)
• Ordovician to Devonian of Canada (5: Nunavut)
• Ordovician to Silurian of Canada (6: Nunavut, Québec)
• Ordovician of Argentina (19), Australia (1), Canada (61: British Columbia, Manitoba, Newfoundland, Northwest Territories, Ontario, Québec), China (34), Greenland (14), Iran (1), Ireland (1), Kazakhstan (1), Malaysia (1), Mongolia (2), New Zealand (1), Peru (1), the Russian Federation (32), Spain (1), Svalbard and Jan Mayen (1), United States (24: Alaska, Colorado, Iowa, Minnesota, Missouri, Nevada, Oklahoma, Wyoming)
Total: 1122 collections including 1569 occurrences