†family Quadragnostidae Howell (artiopod)
Artiopoda - Agnostida - Quadragnostidae
Parent taxon: Agnostina according to A. R. Palmer and C. G. Gatehouse 1972
See also Palmer and Halley 1979
Sister taxa: Agnostogonus, Agnostoidea, Armagnostus, Blystagnostus, Condylopygoidea, Delagnostus, Dignagnostus, Grandagnostus, Hastagnostus, Phoidagnostus, Skryjagnostus
Subtaxa: none
Ecology: slow-moving epifaunal detritivore
Distribution: there are no occurrences of Quadragnostidae in the database