Chordata Bateson, 1885 - chordates
   Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
     Subclass Selachii see Subdivision Selachii
       Order Batoidei see Order Batoidea
         1 Suborder Sarcura
         2 Suborder Narcaciontes [monotypic] see Order Torpediniformes
         3 Suborder Masticura (Gill, 1872)