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
       †"Cornuata"
         Genus †Wladysagitta Voichyshyn, 2006, incertae sedis
           1 †Wladysagitta janvieriᵀ Voichyshyn, 2006
           2 †Wladysagitta acutirostris (Stensiö, 1932)