Phylum Chordata Bateson, 1885 - chordates
   Class †Conodonta Eichenberg, 1930
     Subclass †Conodonti Branson see Subclass Conodonta Eichenberg, 1930
       Order †Ozarkodinida Dzik
         Family †Spathognathodontidae Hass
           1 Genus †Bispathodus Müller, 1962
           2 Genus †Mehlina Youngquist, 1945
           3 Genus †Pseudopolygnathus Branson & Mehl, 1933