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 †Wladysagitta janvieriᵀ Voichyshyn, 2006