Phylum Brachiopoda Duméril, 1806 - brachiopods
   Subphylum Rhynchonelliformea Williams et al., 1996
     Class Rhynchonellata Williams et al., 1996
       Order Rhynchonellida Kuhn, 1949
         Superfamily †Ancistrorhynchoidea Cooper, 1956
           1 Family †Ancistrorhynchidae Cooper, 1956
           2 Family †Sphenotretidae Savage, 1996
           3 Family †Oligorhynchiidae Cooper, 1956
           4 Family †Niorhynicidae Savage, 1996