Chordata Bateson, 1885 - chordates Class Pisces Linnaeus, 1758 see Superclass Pisces Linnaeus, 1758 Subclass Crossopterygii Huxley, 1861 see Infraclass Crossopterygii Huxley, 1861 Order Rhipidistia (Cope, 1887) see [unranked] Rhipidistia Cope, 1887 Family Protopteridae - African lungfishes