Chordata Bateson, 1885 - chordates
Count: -
   Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
  Count: [f†f] 7o;39f;5g; †4o;22f;4g
     Subclass Selachii see Subdivision Selachii
    Count: [f†f] 6o;36f;4g; †4o;19f;4g
       Order Batoidei see Order Batoidea
      Count: [f†f] 12f; †3f;1g
         Suborder Masticura (Gill, 1872)
        Count: [f†f] 6f; †1f
           Family †Ptychodontidae Jaekel, 1898
          Count: -