Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Brachiopoda Duméril, 1806 - brachiopods
     Class Articulata Huxley, 1869
       Genus †Gacella Williams, 1962
       Genus †Sellithyris Middlemiss, 1959
       Genus †Tritoechia Ulrich & Cooper, 1936
       1 Order †Orthida Schuchert & Cooper, 1932
       1.n.1 Order †Strophomenida Opik, 1934
       1.n.2 Order †Pentamerida Schuchert & Cooper, 1931
       1.n.2.n Order Rhynchonellida Kuhn, 1949
       1.n.2.n.n Order †Spiriferida Waagen, 1883
       1.n.2.n.n.n Order Terebratulida Waagen, 1883