Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Brachiopoda Duméril, 1806 - brachiopods
     Class Articulata Huxley, 1869
       Order †Orthida Schuchert & Cooper, 1932
         Superfamily †Billingsellacea see Superfamily Billingselloidea Schuchert, 1893
         Genus †Dalmanella (Hall & Clarke, 1892)
         Genus †Dicoelosia King, 1850
         Genus †Dinorthis Kobayashi, 1937 see Subgenus Dinorthis Kobayashi, 1937
         Genus †Enteletes Fischer de Waldheim, 1825
         Genus †Glyptorthis Foerste, 1912
         Genus †Hesperorthis Schuchert & Cooper, 1931
         Genus †Multicostella Schuchert & Cooper, 1931
         Genus †Onniella Bancroft, 1928
         Genus †Rhipidomella Oehlert, 1890