Artiopoda - Agnostida - Ammagnostidae
Alternative spelling: Ammagnostinae
Parent taxon: Condylopygoidea according to E. B. Naimark and T. V. Pegel 2017
See also 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 Proagnostus
Type: Ammagnostus
Ecology: slow-moving epifaunal detritivore
Distribution:
• Ayusokkanian of Kazakhstan (14 collections)
• Marjumian of Greenland (6), United States (2: Alabama, Utah)
• Cambrian of Australia (4), Canada (1: Yukon), China (67), France (1), Greenland (2), India (2), Kazakhstan (11), North Korea (1), the Russian Federation (4), South Korea (5), United States (5: Utah, Wisconsin, Wyoming)
Total: 125 collections including 187 occurrences