Phylum Brachiopoda Duméril, 1806 - brachiopods
   Subphylum Rhynchonelliformea Williams et al., 1996
     Class †Strophomenata Williams et al, 1996
       Order †Productida Sarycheva & Sokolskaya, 1959
         Suborder †Strophalosiidina Schuchert, 1913
           Superfamily †Richthofenioidea Waagen, 1885
             1 Family †Richthofeniidae Waagen, 1885
             2 Family †Hercosiidae Cooper & Grant, 1975
             3 Family †Cyclacanthariidae Cooper & Grant, 1975
             4 Family †Gemmellaroiidae (Williams, 1953)