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 †Ctenaspididae Kiaer, 1930, nom. praeval. Genus †Ctenaspis Kiaer, 1930 †Ctenaspis russelli Dineley, 1976