Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct.
       Vertebrata Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
         Superclass †Pteraspidomorphi Goodrich, 1909 [monotypic]
           Class †Pteraspidomorphi Goodrich, 1909 see Class Pteraspidomorpha
             Subclass †Arandaspida [monotypic]
               Order †Arandaspidiformes Ritchie & Gilbert-Tomlinson, 1977
                 1.1 Genus †Sacabambaspis Gagnier, Blieck & Rodrigo, 1986
                 1.2 ?Genus †Andinaspis Gagnier, 1991
                 2.1 Genus †Arandaspis Ritchie & Gilbert-Tomlinson, 1977
                 2.2 ?Genus †Porophoraspis Ritchie & Gilbert-Tomlinson, 1977