†suborder Agnostina Salter 1864 (artiopod)
Parent taxon: Agnostida according to E. Landing et al. 2008
See also Harrington and Leanza 1957 and Palmer and Gatehouse 1972
Sister taxa: Ceragnostus, Eodiscina, Formagnostus, Glyptagnostidae, Lavsanodiscus, Pleurinodus, Quadrahomagnostinae, Sphaeragnostidae
Subtaxa: Agnostogonus Agnostoidea Armagnostus Blystagnostus Condylopygoidea Delagnostus Dignagnostus Grandagnostus Hastagnostus Phoidagnostus Quadragnostidae Skryjagnostus
Ecology: slow-moving epifaunal detritivore