Phylum Brachiopoda Duméril, 1806 - brachiopods Subphylum Rhynchonelliformea Williams et al., 1996 Class Rhynchonellata Williams et al., 1996 Order †Atrypida Rzhonsnitskaya, 1960 Suborder †Davidsoniidina Copper, 1996 Superfamily †Davidsonioidea King, 1850 Family †Davidsoniidae King, 1850