vertebrates Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Class †Pteraspidomorphi Goodrich, 1909 see Class Pteraspidomorpha
     Subclass †Heterostraci Lankester, 1868
       Order †Cyathaspidiformes Kiaer, 1930
         Family †Irregulareaspididae Denison, 1964 see Subfamily Irregulareaspidinae Denison, 1964
           Genus †Irregulareaspis Zych, 1931
             †Irregulareaspis complicata Kiaer, 1932, nom. nud.