Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801 Gnathostomata Teleostomi Bonaparte, 1836 ?Class? †Acanthodii Owen, 1846 - acanthodians Order †Ischnacanthiformes Berg, 1940 [monotypic] 1 Family †Ischnacanthidae Woodward, 1891