Position in a system
| 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 - Bilaterians |
| 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 Osborn, 1903 |
| cohors | Archosauromorpha Huene, 1946 |
| superorder | Archosauria |
| order | Dinosauria Owen, 1842 - dinosaurs † |
| suborder | Saurischia Seeley, 1887 † |
| infraorder | Theropoda Marsh, 1881 † |
| superfamily | Abelisauroidea Bonaparte & Novas, 1985 † |
| family | Abelisauridae Bonaparte & Novas, 1985 † |
| genus | Aucasaurus Coria Chiappe & Dingus, 2002 - auca lizard † |
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