Phylum [Vertebrata] (Lamarck, 1801) Class Amphibia Linnaeus, 1758 - amphibians see Class Amphibia Gray, 1825 Subclass †Labyrinthodontia Meyer, 1842 see Class Amphibia Linnaeus, 1758 Order †Ichthyostegalia (Save-Soderbergh, 1932) see Superclass Tetrapoda Goodrich, 1930 Family †Ichthyostegidae Save-Soderbergh, 1932 Genus †Ichthyostega Säve-Söderbergh, 1932