[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Thelodontomorphi Jaekel, 1911 [monotypic]
         Class †Thelodonti Jaekel, 1911
           01 Family †Helenolepididae Wilson & Märss, 2009
           02 Family †Longodidae Märss, 2006
           03 Family †Oeseliidae Märss, 2005
           04 Order †Archipelepidiformes
           05 Order †Furcacaudiformes Wilson & Caldwell, 1998 - fork-tailed thelodonts
           06 Order †Thelodontiformes Kiaer, 1932
           07 Order †Sandiviiformes
           08 Order †Loganelliiformes Turner, 1991
           09 Order †Shielliiformes van der Laan, 2018, orth. inval. [monotypic] see Order Shieliiformes Märss, Wilson & Thorsteinsson, 2002
           10 Order †Phlebolepidiformes Berg, 1937