Back Arctosaurus Spanish آرکتوسور FA Arctosaurus French アルクトサウルス Japanese 아크토사우루스 Korean Arctosaurus Dutch Arctossauro Portuguese Arctosaurus osborni Russian Arctosaurus VI 北極龍屬 Chinese
| Arctosaurus Temporal range: Late Triassic,
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| Sketch of the holotype | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Archosauromorpha |
| Clade: | Crocopoda |
| Clade: | †Allokotosauria |
| Genus: | †Arctosaurus Adams, 1875 |
| Type species | |
| †Arctosaurus osborni Adams, 1875
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Arctosaurus is an extinct genus of archosauromorph, possibly an allokotosaurian,[1] but was often classified as a sauropodomorph dinosaur between 1900 and 1976. Although it has also been classified as a theropod, recent review finds that the similarities it shares with theropods are spread throughout several groups of Late Triassic reptiles, and so it cannot be assigned any more specifically than to Archosauriformes.[2] Other authors have suggested trilophosaurian affinities.[3][4] Based on the size of the vertebra, a size of about 1.5 metres (4.9 ft) in length is extrapolated.
- ^ Cite error: The named reference
Sues16was invoked but never defined (see the help page). - ^ Nesbitt, Sterling J.; Irmis, Randall B.; Parker, William G. (2007). "A critical re-evaluation of the Late Triassic dinosaur taxa of North America". Journal of Systematic Palaeontology. 5 (2): 209–243. Bibcode:2007JSPal...5..209N. doi:10.1017/S1477201907002040. S2CID 28782207.
- ^ Glut, D.F. (1997). "Excluded Genera". Dinosaurs: The Encyclopedia. McFarland & Company. pp. 1005–1010. ISBN 0-89950-917-7.
- ^ Russell, Dale A. (1989). An Odyssey in Time: Dinosaurs of North America. Minocqua, Wisconsin: NorthWord Press, Inc. p. 26. ISBN 1-55971-038-1.