Artiopoda - Agnostida - Pseudagnostidae
Alternative spelling: Pseudagnostinae
Parent taxon: Condylopygoidea according to E. B. Naimark and T. V. Pegel 2017
See also Harrington and Leanza 1957, Robison and Pantoja-Alor 1968 and Westrop et al. 1996
Sister taxa: Agnostidae, Ammagnostidae, Clavagnostidae, Condylopygidae, Diplagnostidae, Doryagnostidae, Glaberagnostus, Glyptagnostus, Leiagnostus, Megagnostus, Metagnostidae, Phalacromidae, Phalagnostus, Phaldagnostus, Ptychagnostidae, Spinagnostidae, Valenagnostus
Subtaxa: Asqaragnostus Han Norilagnostus Trisulcagnostus Yongwolagnostus
Ecology: slow-moving epifaunal detritivore
Distribution:
• Taoyuanian of the Russian Federation (4 collections), South Korea (4)
• Cambrian of Australia (1), Kazakhstan (16)
Total: 25 collections including 27 occurrences