Archosaurus

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Archosaurus
Temporal range: Late Permian, 252 Ma
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Archosaurus rossicus skull.JPG
Restored skull
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Family: †Proterosuchidae
Genus: †Archosaurus
Tatarinov, 1960
Species:
†A. rossicus
Binomial name
†Archosaurus rossicus
Tatarinov, 1960

Archosaurus (meaning "ruling lizard") is an extinct genus of carnivorous proterosuchid archosauriform reptile.[1] From the latest Permian of Russia and Poland, it is one of the earliest known archosauriforms. The type and only species is Archosaurus rossicus, known from several fragmentary specimens which cumulatively represent parts of the skull and cervical vertebrae.[2][3] It would have been 3 metres (9.8 ft) long when fully grown.[4]

When first described in 1960, Archosaurus was considered the oldest known archosaur and a close relative of Proterosuchus from the Early Triassic.[2][4] However, Archosauria in modern terms is considered a more restricted group which Archosaurus lies outside of. The "classic" definition of archosaur utilized prior to the widespread use of cladistics is now roughly equivalent to the clade Archosauriformes.[5] Archosaurus is still considered the oldest undisputed archosauriform, as well as one of the few valid members of the family Proterosuchidae.[6]

Gallery[]

  • PIN 1100/55, the holotype left premaxilla

  • Restoration

  • Size comaprison

See also[]

References[]

  1. ^ Sennikov, A. G.; Golubev, V. K. (2006). "Vyazniki biotic assemblage of the terminal Permian". Paleontological Journal. 40 (4): S475. doi:10.1134/S0031030106100078. S2CID 129507095.
  2. ^ a b Paleont. Zh. 1960 (4)
  3. ^ Sennikov, A.G.; Gower, D.J. (2000). "Early archosaurs from Russia". In Benton, M.J.; Shishkin, M.A.; Unwin, D.M. (eds.). The Age of Dinosaurs in Russia and Mongolia. Cambridge: Cambridge University Press. ISBN 978-0-521-54582-2.
  4. ^ a b Tatarinov, L. P. (1960). Otkrytie pseudozhukhii v verkhnei permi SSSR: Paleontologischeskii Zhurnal, 1960, n. 4, p. 74-80.
  5. ^ Gauthier J. A. (1994): The diversification of the amniotes. In: D. R. Prothero and R. M. Schoch (ed.) Major Features of Vertebrate Evolution: 129-159. Knoxville, Tennessee: The Paleontological Society.
  6. ^ Ezcurra, Martín D. (2016-04-28). "The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms". PeerJ. 4: e1778. doi:10.7717/peerj.1778. ISSN 2167-8359. PMC 4860341. PMID 27162705.


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