Phylum Brachiopoda Duméril, 1806 - brachiopods
   Subphylum Rhynchonelliformea Williams et al., 1996
     Class Rhynchonellata Williams et al., 1996
       Order Rhynchonellida Kuhn, 1949
         Superfamily †Rhynchotrematoidea Schuchert, 1913
           1 Family †Rhynchotrematidae Schuchert, 1913
           2 Family †Trigonirhynchiidae McLaren, 1965
           3 Family †Orthorhynchulidae Cooper, 1956
           4 Family †Leptocoeliidae Boucot & Gill, 1956
           5 Family †Machaerariidae Savage, 1996
           6 Family †Phoenicitoechiidae Havlicek, 1990