Chordata Bateson, 1885 - chordates
   Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
     Subclass Selachii see Subdivision Selachii
       Order Batoidei see Order Batoidea
         Suborder Sarcura
           Family Rhinobatidae Müller & Henle, 1838 - guitarfishes