[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Pentadactyla branchiata
               Class Amphibia Gray, 1825
                 Subclass Phractamphibia Haeckel, 1866
                   Order Labyrinthodonta
                     Genus Archegosaurus Goldfuss, 1847