Chordata Bateson, 1885 - chordates
Status: extant; Count: -
   Class Elasmobranchii Bonaparte, 1838 see Infraclass Elasmobranchii Bonaparte, 1838
  Status: extant; Count: [f†f] 7o;39f;5g; †4o;22f;4g
     Subclass Selachii see Division Selachii
    Status: extant; Count: [f†f] 6o;36f;4g; †4o;19f;4g
       Order †Pleuropterygii [monotypic] see Order Cladoselachiformes
      Status: fossil; Count: [†*] †1f;1g
         32 Family †Cladoselachidae Dean, 1894 [monotypic]
        Status: fossil; Count: [†*] †1g