[Kingdom] Animalia Linnaeus, 1758 - animals Grade Enterozoa Grade Cœlomata Phylum Vertebrata (Lamarck, 1801) Branch Craniata Linnaeus, 1758 Grade Gnathostoma Subgrade Pentadactyla lipobranchia Branch Monocondyla Class Reptilia Linnaeus, 1758 - reptiles Subclass Ornithoscelida (Huxley, 1870) Genus Megalosaurus Buckland, 1822