Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes see Infraclass Elasmobranchii Bonaparte, 1838
   Cohort Euselachii Hay, 1902 - spined sharks and relatives see Subclass Euselachii Hay, 1902
     Subcohort Neoselachii Compagno, 1977 - modern sharks and rays see Infraclass Elasmobranchii Bonaparte, 1838
       Order Rhinobatiformes Müller & Henle, 1837 - guitarfishes see Order Rhinopristiformes Naylor, Caira, Jensen, Rosana, Straube & Lakner, 2012
         1 Family Rhinidae Müller & Henle, 1841 - bowmouth guitarfishes
         2 Family Rhinobatidae Bonaparte, 1835 - guitarfishes