Subphylum [Vertebrata] Cuvier, 1812 - vertebrates Class Agnatha Cope, 1889 Subclass †Thelodonti Kiaer, 1932 Order †Phlebolepidiformes Berg, 1937 1 Family †Phlebolepididae Berg, 1940 2 Family †Katoporodidae Märss, Wilson & Thorsteinsson, 2002