Parent taxon: Goniatitina according to Z. R. Zhou 2017
See also Furnish et al. 2009
Sister taxa: Adrianitoidea, Cycloloboidea, Dimorphoceratoidea, Gastrioceratoidea, Girtyocerataceae, Goniatitidae, Goniatitoidea, Gonioloboceratoidea, Marathonitoidea, Neodimorphoceratoidea, Neoglyphioceratoidea, Neoicoceratoidea, Nomismoceratoidea, Pericycloidea, Popanoceratoidea, Schistoceratoidea, Shumarditoidea, Somoholitoidea, Thalassoceratoidea
Subtaxa: Agathiceratidae
Type: Agathiceras
Ecology: fast-moving nektonic carnivore
Distribution:
• Permian of Australia (1 collection), Canada (4: British Columbia, Nunavut), China (20), East Timor (2), Greece (1), Indonesia (4), Iran (1), Iraq (1), Italy (5), Japan (11), Kazakhstan (10), Malaysia (6), Mexico (1), Oman (2), the Russian Federation (7), Tajikistan (72), Thailand (6), Tunisia (2), Ukraine (1), United States (49: California, Texas)
• Carboniferous to Permian of Iran (2), Kazakhstan (1)
• Carboniferous of Canada (1: Nunavut), Kazakhstan (10), the Russian Federation (17), Tajikistan (1), United States (7: Texas)
Total: 245 collections including 273 occurrences