Conodonta - Protopanderodontida - Acanthodontidae
Parent taxon: Protopanderodontida according to L. J. Pyle and C. R. Barnes 2002
See also Clark et al. 1981 and Sweet 1988
Sister taxa: Clavohamulidae, Cornuodontidae, Drepanoistodontidae, Oneotodontidae, Protopanderodontidae, Serratognathidae
Subtaxa: Acanthodistacodus Acanthodus Parapaltodus Scalpellodus Ulrichodina
Ecology: nektonic carnivore
Distribution:
• Devonian of United States (1: Nevada collection)
• Aluoja of Sweden (8)
• Whiterockian of Canada (1: Northwest Territories)
• Arenig of Argentina (1), Canada (1: Ontario), China (4)
• Ordovician of Argentina (18), Australia (4), Canada (12: British Columbia, Newfoundland, Quebec), China (5), Estonia (11), Malaysia (1), New Zealand (4), the Russian Federation (30), South Korea (3), Svalbard and Jan Mayen (1), Sweden (9), United States (17: Colorado, Nevada, New Mexico, New York, Texas, Utah)
• Ibexian of United States (1: New York)
Total: 132 collections including 165 occurrences