Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Brachiopoda Duméril, 1806 - brachiopods
     Class Articulata Huxley, 1869
       Order †Spiriferida Waagen, 1883
         1 Suborder †Atrypidina Moore, 1952
         2 Suborder †Spiriferidina Waagen, 1883
         3 Suborder †Athyrididina Boucot et al., 1964
         4 Suborder †Retziidina Boucot et al., 1964