Phylum Brachiopoda Duméril, 1806 - brachiopods
   Subphylum Rhynchonelliformea Williams et al., 1996
     Class Rhynchonellata Williams et al., 1996
       Order †Pentamerida Schuchert & Cooper, 1931
         Suborder †Pentameridina Schuchert & Cooper, 1931
           Superfamily †Pentameroidea McCoy, 1844
             1 Family †Virgianidae Boucot & Amsden, 1963
             2 Family †Pentameridae M'Coy, 1844
             3 Family †Subrianidae Sapelnikov, 1963