Phylum Chordata Bateson, 1885 - chordates
   Class †Conodonta Eichenberg, 1930
     Subclass †Conodonti Branson see Subclass Conodonta Eichenberg, 1930
       Order †Ozarkodinida Dzik
         Family †Polygnathidae Bassler
           Genus †Polygnathus Hinde, 1879
             †"Polygnathus germanus group"
               1 †Polygnathus germanus Ulrich & Bassler
               2 †Polygnathus perplexus Thomas
               3 †Polygnathus diversus Helms
               4 †Polygnathus homoirregularis Ziegler
               5 †Polygnathus meijerdreesi D.I. Johnston & B.D.E. Chatterton, 2001
               6 †Polygnathus planirostratus Dreesen & Dusar?
               7 †Polygnathus pomeranicus Matyja