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 †Palaferelloidea Spriestersbach, 1942 1 Family †Palaferellidae Spriestersbach, 1942 2 Family †Karpinskiidae Poulsen, 1943 3 Family †Symmatrypidae Mizens, 1989