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 †Scolenaspididae Afanassieva, 1991
             Genus †Zychaspis Janvier, 1985
               †Zychaspis concinna Voichyshyn & Solodkyi, 2004