Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
Count: [f†f] 1p;7c;86o;538f; †1p;8c;99o;293f;53g;1s [4 May 2025]
   Phylum Chordata Bateson, 1885 - chordates
  Count: [f†f] 7c;86o;538f; †7c;99o;292f;53g;1s [4 May 2025]
     Subphylum Craniata auct.
    Count: [f†f] 4c;85o;536f; †6c;99o;292f;49g;1s [4 May 2025]
       Infraphylum Vertebrata Lamarck, 1801 - vertebrates
      Count: [f†f] 3c;84o;535f; †6c;99o;292f;49g;1s [4 May 2025]
         Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
        Count: [f†f] 2c;83o;532f; †2c;81o;255f;48g
           Grade †Placodermiomorphi [monotypic]
          Count: [†f] †1c;7o;25f [22 Mar 2025]
             Class †Placodermi McCoy, 1848 [paraphyletic?]
            Count: [†f] †7o;25f [22 Mar 2025]
               .1 [[Order] †Stensioelliformes]
              Count: -
               1 Order †Pseudopetalichthyiformes [monotypic]
              Count: [†f] †1f [22 Mar 2025]
               2 Order †Acanthothoraciformes see Order Acanthothoraci Stensiö, 1944
              Count: -
               3 Order †Rhenaniformes [monotypic] see Order Rhenanida Broili, 1930
              Count: [†f] †1f [22 Mar 2025]
               4 Order †Antiarchiformes Grande & Eastman, 1986 - antiarchs see [unranked] Antiarchi Cope, 1885
              Count: [†f] †7f
               5 Order †Petalichthyiformes see Order Macropetalichthyiformes
              Count: -
               6 Order †Ptyctodontiformes [monotypic]
              Count: [†f] †1f [22 Mar 2025]
               7 Order †Arthrodiriformes Grande & Eastman, 1986 - arthrodires see [unranked] Arthrodira Woodward, 1891
              Count: [†f] †15f