Conodonta - Prioniodontida - Acodontidae
Parent taxon: Prioniodontida according to L. J. Pyle and C. R. Barnes 2002
Sister taxa: Anticostiodus, Balognathidae, Balognathoidea, Cyrtoniodontidae, Distomodontidae, Histiodella, Multioistodontidae, Oepikodus, Oistodontidae, Paracordylodontidae, Paracordylodus, Periodontidae, Phragmodus, Plectodinidae, Prioniodinida, Prioniodinina, Prioniodontacea, Rhipidognathidae, Sagittodontina, Strachanognathidae
Subtaxa: Acodus Diaphorodus Nealeodus Pteracontiodus Triangulodus Tripodus Tropodus
Ecology: nektonic carnivore
Distribution:
• Devonian of Canada (1: Ontario collection), Czechia (2), Thailand (1)
• Silurian of Estonia (1), Malaysia (2), the United Kingdom (1), United States (90: California, Georgia, Indiana, Kentucky, Missouri, Ohio)
• Aluoja of Sweden (8)
• Chazyan of United States (1: Tennessee)
• Whiterockian of United States (10: Nevada)
• Billingen of Estonia (6)
• Arenig of Argentina (3), China (15), the Russian Federation (1)
• Dawan of China (3)
• Ordovician of Argentina (22), Australia (4), Canada (47: British Columbia, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Quebec), China (39), Estonia (17), Iran (5), Kazakhstan (2), Malaysia (11), Mexico (1), New Zealand (4), Peru (1), the Russian Federation (20), South Korea (4), Spain (2), Sweden (14), Thailand (2), the United Kingdom (1), United States (9: Nevada, New York, Utah, Virginia, Wyoming)
• Ibexian of United States (1: New York)
• Taoyuanian of China (2)
• Cambrian of Canada (1: Nunuvat), China (1)
Total: 355 collections including 442 occurrences