fossil marine animal genera Linnaeus, 1758 - animals Phylum Chordata Bateson, 1885 - chordates Chordata Bateson, 1885 - chordates see Phylum Chordata Bateson, 1885 Class †Pteraspidomorphi Goodrich, 1909 1 Order †Astraspidiformes Berg, 1940 2 Order †Pteraspidomorphes see Subclass Heterostraci Lankester, 1868 3 Order †Furcacudiformes see Order Furcacaudiformes Wilson & Caldwell, 1998 4 Order †Thelodontiformes Kiaer, 1932 5 Order †uncertain