Phylum Brachiopoda Duméril, 1806 - brachiopods
   Subphylum Rhynchonelliformea Williams et al., 1996
     Class Rhynchonellata Williams et al., 1996
       Order †Athyridida Boucot et al., 1964
         Suborder †Athyrididina Boucot et al., 1964
           Superfamily †Athyridoidea McCoy, 1841
             1 Family †Athyrididae McCoy, 1841
             2 Family †Diplospirellidae Schuchert, 1894
             3 Family †Hyattidinidae (Sheehan, 1977)