Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Pisces Class Actinopterygii Woodward, 1891 - ray-finned fishes Order Notacanthiformes Goodrich, 1909 - spiny eels Family Halosauridae Günther, 1868 - halosaurs Family Lipogenyidae see Family Notacanthidae Rafinesque, 1815 Family Notacanthidae Rafinesque, 1815 - spiny eels