Phylum Chordata Bateson, 1885 - chordates
   Class †Conodonta Eichenberg, 1930
     Subclass †Conodonti Branson see Subclass Conodonta Eichenberg, 1930
       Order †Prioniodontida Dzik
         Family †Icriodontidae Müller & Müller
           1 Genus †Icriodus Branson & Mehl, 1933
           2 Genus †Pelekysgnathus Thomas, 1949