Subphylum [Vertebrata] Cuvier, 1812 - vertebrates
   Class Agnatha Cope, 1889
     Subclass †Thelodonti Kiaer, 1932
       Order †Phlebolepidiformes Berg, 1937
         Family †Katoporodidae Märss, Wilson & Thorsteinsson, 2002
           Genus †Katoporodusᵀ Turner & Peel, 1986
             1 †Katoporodus serratus Märss, Wilson & Thorsteinsson, 2002
             2.1 †Katoporodus gemellus Märss, Wilson & Thorsteinsson, 2002
             2.2 †Katoporodus lithuanicus Karatajūtė-Talimaa, 1978