Phylum Chordata Bateson, 1885 - chordates
   Class †Conodonta Eichenberg, 1930
     Subclass †Conodonti Branson see Subclass Conodonta Eichenberg, 1930
       Order †Ozarkodinida Dzik
         1 Family †Elictognathidae Austin & Rhodes
         2 Family †Palmatolepidae Sweet
         3 Family †Polygnathidae Bassler
         4 Family †Spathognathodontidae Hass