Vertebrata Cuvier, 1812 - vertebrates
Count: [f†f] 7c;100o;734f; ‡2o;8f; †2c;109o;819f;10g [22 Aug 2017]
   Gnathostomata
  Count: [f†f] 6c;98o;732f; ‡2o;8f; †2c;104o;782f;9g [22 Aug 2017]
     Class †Placodermi McCoy, 1848
    Count: [†f] †9o;37f;2g [12 May 2017]
       Order †Arthrodira Woodward, 1891 see Order Arthrodiriformes Grande & Eastman, 1986
      Count: [†f] †25f;1g [9 May 2017]
         Suborder †Brachythoraci Gross, 1932
        Count: [†f] †14f [9 May 2017]
           Superfamily †Brachydeiroidea Denison, 1978
          Count: [†f] †2f [8 May 2017]
             Family †Leptosteidae Jaekel, 1911
            Count: -