[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Osteostracomorphi
         Class †Osteostraci Lankester, 1868
           Order †Thyestiformes
             Family †Kiaeraspididae Stensiö, 1932, nom. praeval.
               1 Genus †Kiaeraspis Stensiö, 1927
               2 Genus †Nectaspis Wängsjö, 1952
               3 Genus †Axinaspis Wängsjö, 1952
               4 Genus †Acrotomaspis Wängsjö, 1952