fossil marine animal genera Linnaeus, 1758 - animals Phylum Chordata Bateson, 1885 - chordates Chordata Bateson, 1885 - chordates see Phylum Chordata Bateson, 1885 Class Cephalaspidomorphi Moy-Thomas & Mile, 1971 1 Order †Cephalaspidoformes see Order Cephalaspidiformes 2 Order †Atelaspidiformes see Order Cephalaspidiformes 3 Order †Birkeniiformes see Order Anaspidiformes 4 Order †Anaspida Traquair - anaspids see Class Anaspida Traquair 5 Order Petromyzoniformes see Order Petromyzontiformes Berg, 1940 6 Order Myxiniformes - hagfishes