Chordata Bateson, 1885 - chordates
   Class †Ostracophori
     Order †Osteostraci Lankester, 1868 - osteostracans see Order Cephalaspidiformes Halstead Tarlo, 1967
       Family †Euphaneropidae Woodward, 1900 [monotypic]
         1 Genus †Euphanerops Woodward, 1900