Phylum Chordata Bateson, 1885 - chordates
   Class †Conodonta Eichenberg, 1930
     Subclass †Conodonti Branson see Subclass Conodonta Eichenberg, 1930
       Order †Ozarkodinida Dzik
         Family †Spathognathodontidae Hass
           Genus †Mehlina Youngquist, 1945
             1 †Mehlina gradata Youngquist
             2 †Mehlina ovata D.I. Johnston & B.D.E. Chatterton, 2001
             3 †Mehlina strigosa (Branson & Mehl)