| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Animalia Linnaeus, 1758 - animals |
| subregnum | Eumetazoa Butschli, 1910 |
| divisio | Bilateria Hatschek, 1888 |
| subdivisio | Deuterostomia - deuterostomes |
| phylum | Chordata Bateson, 1885 - chordates |
| subphylum | Vertebrata Cuvier, 1812 - vertebrates |
| infraphylum | Gnathostomata Zittel, 1879 - jawed vertebrates |
| superclassis | Tetrapoda Gaffney, 1979 - four-limbed vertebrates |
| subclass | Amniota Haeckel, 1866 |
| infraclass | Diapsida |
| cohors | Lepidosauromorpha |
| superorder | Lepidosauria |
| order | Squamata Oppel, 1811 - lizards and snakes |
| suborder | Sauria Gauthier, 1984 - Lizards |
| infraorder | Lacertilia |
| superfamily | Varanoidea |
| family | Helodermatidae Gray, 1837 - venomous lizards |
| genus | Heloderma Wiegmann, 1829 - glla monsters |
| species | Heloderma suspectum Cope, 1869 - Gila Monster |
| subspecies | Heloderma suspectum suspectum (Cope, 1869) - Reticulate Gila Monster |