Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Brachiopoda Duméril, 1806 - brachiopods
     Class Articulata Huxley, 1869
       Order †Spiriferida Waagen, 1883
         Suborder †Spiriferidina Waagen, 1883
           Genus †Crurithyris George, 1931
           Genus †Cyrtospirifer Fredericks, 1924
           Genus †Eospirifer Schuchert, 1913
           Genus †Mucrospirifer Grabau, 1931
           Genus †Neospirifer Fredericks, 1919
           Genus †Platyrachella Fenton & Fenton, 1924