Chordata Bateson, 1885 - chordates
   Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
     Subclass Selachii see Subdivision Selachii
       Order Cestraciontes
         Suborder †Janassides
           Family †Tamiobatidae Glikman, 1964 [monotypic]
             1 Genus †Tamiobatis Eastman, 1897 [monotypic]