Phylum Brachiopoda Duméril, 1806 - brachiopods
   Subphylum Rhynchonelliformea Williams et al., 1996
     Class Rhynchonellata Williams et al., 1996
       Order †Pentamerida Schuchert & Cooper, 1931
         1 Suborder †Syntrophiidina Ulrich & Cooper, 1936
         2 Suborder †Pentameridina Schuchert & Cooper, 1931