Phylum Brachiopoda Duméril, 1806 - brachiopods
   Subphylum Rhynchonelliformea Williams et al., 1996
     Class Rhynchonellata Williams et al., 1996
       Order †Athyridida Boucot et al., 1964
         Superfamily †Anoplothecoidea Schuchert, 1894
           1 Family †Anoplothecidae Schuchert, 1894
           2 Family †Kayseriidae Boucot et al., 1964