Subphylum [Vertebrata] Cuvier, 1812 - vertebrates
   Class Agnatha Cope, 1889
     Subclass †Thelodonti Kiaer, 1932
       Order †Thelodontiformes Kiaer, 1932
         Family †Lanarkiidae Obruchev, 1949
           1 Genus †Lanarkiaᵀ Traquair, 1899
           2 Genus †Phillipsilepis Märss, Wilson & Thorsteinsson, 2002