Phylum Brachiopoda Duméril, 1806 - brachiopods
   Subphylum Rhynchonelliformea Williams et al., 1996
     Class Rhynchonellata Williams et al., 1996
       Order †Athyridida Boucot et al., 1964
         1 Suborder †Athyrididina Boucot et al., 1964
         2 Suborder †Retziidina Boucot et al., 1964
         3 Suborder †Koninckinidina Harper, 1993
         4 Superfamily †Dayioidea Waagen, 1883
         5 Superfamily †Anoplothecoidea Schuchert, 1894
         6 Superfamily †Uncitoidea d'Orbigny, 1847