vertebrates Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Class †Cephalaspidomorphi Kiaer & Stensiö, 1920 see Class Osteostraci Lankester, 1868
     Subclass †Osteostraci Lankester, 1868 see Class Osteostraci Lankester, 1868
       Order †Benneviaspidiformes Afanassieva, 1991
         Suborder †Scolenaspidoidei Afanassieva, 1991
           Family †Zenaspididae Stensiö, 1958
             Genus †Zenaspisᵀ Lankester, 1870
               †Zenaspis kasymyri Voichyshyn, 2011