Artiopoda - Agnostida - Ammagnostidae
Alternative spelling: Ammagnostinae
Parent taxon: Condylopygoidea according to E. B. Naimark and T. V. Pegel 2017
See also Bentley et al. 2006, Hong et al. 2003 and Jago et al. 2004
Sister taxa: Agnostidae, Clavagnostidae, Condylopygidae, Diplagnostidae, Doryagnostidae, Glaberagnostus, Glyptagnostus, Leiagnostus, Megagnostus, Metagnostidae, Phalacromidae, Phalagnostus, Phaldagnostus, Pseudagnostidae, Ptychagnostidae, Spinagnostidae, Valenagnostus
Subtaxa: Ammagnostus Hadragnostus Proagnostus
Type: Ammagnostus
Distribution:
• Taoyuanian of China (1 collection), South Korea (5)
• Cambrian of Antarctica (5), Australia (5), Canada (3: Yukon), China (68), France (1), Greenland (8), India (2), Iran (1), Kazakhstan (28), New Zealand (1), North Korea (1), the Russian Federation (4), United States (17: Alabama, South Dakota, Utah, Wisconsin, Wyoming)
Total: 150 collections including 222 occurrences