Conodonta - Ozarkodinida - Polygnathidae
Parent taxon: Polygnathacea according to P. C. J. Donoghue et al. 2008
See also Chatterton and Perry 1977, Clark et al. 1981 and Gunnell 1933
Sister taxa: Cavusgnathidae, Clydagnathus, Cryptotaxidae, Dinodus, Eognathodus, Kockelellamecdup, Lochriea, Nicollidina, Vogelgnathus
Subtaxa: Ancyrodella Ancyrodelloides Ancyrognathus Ancyrolepis Avignathus Bispathodus Cavusgnathus Hemilistrona Kimognathus Klapperina Linguipolygnathus Masaraella Mehlina Neopolygnathus Nodognathus Palmatolepinae Pandorinellina Polygnathus Polylophodonta Pseudopolygnathus Rhachistognathus Scaphignathus Schmidtognathus Siphonodella Synclydagnathus Zieglerina
Ecology: nektonic carnivore
Distribution:
• Triassic of Greece (1 collection), Serbia and Montenegro (1)
• Carboniferous of Austria (6), China (27), Germany (3), Greece (2), India (1), Iran (2), Ireland (3), Mexico (3), the Russian Federation (14), the United Kingdom (33), United States (58: Alabama, Arkansas, California, Iowa, Kentucky, Missouri, Montana, Nevada, Ohio, Oklahoma, Pennsylvania, Texas, Utah, Virginia, Wyoming)
• Devonian to Triassic of Greece (1)
• Devonian of Algeria (20), Australia (163), Austria (58), Belgium (35), Brazil (1), Bulgaria (7), Canada (22: Northwest Territories and Yukon, Nunavut, Ontario, Yukon, Yukon Territory), China (112), the Czech Republic (43), France (91), Germany (143), Greece (6), Iran (12), Italy (22), Mongolia (4), Morocco (240), Myanmar (2), Poland (88), Portugal (1), the Russian Federation (56), Spain (184), Tajikistan (5), Turkey (3), United States (204: Alaska, Arizona, California, Indiana, Iowa, Michigan, Minnesota, Nevada, New Mexico, New York, Ohio), Uzbekistan (9), Vietnam (5), Western Sahara (2)
• Silurian to Devonian of Australia (2)
Total: 1695 collections including 4613 occurrences