[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
         Class †Placodermi McCoy, 1848
           1 Order †Brindabellaspida Young, 1980 [monotypic]
           2 Order †Stensioelliformes [monotypic]
           3 Order †Pseudopetalichthyiformes [monotypic]
           4 Order †Acanthothoraci Stensiö, 1944
           5 Order †Rhenanida Broili, 1930 [monotypic]
           6 †Antiarchi Cope, 1885 - antiarchs
           7 Order †Macropetalichthyiformes
           8 Order †Ptyctodontiformes [monotypic]
           9 †Arthrodira Woodward, 1891