Noasaurus

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Noasaurus leali
Temporal range: Late Cretaceous, 70 Ma
Noasaurus leali.jpg
Skeletal restoration showing known remains
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Saurischia
Suborder: Theropoda
Family: Noasauridae
Subfamily: Noasaurinae
Genus: Noasaurus
Bonaparte & Powell, 1980
Species: † N. leali
Binomial name
Noasaurus leali
Bonaparte & Powell, 1980

Noasaurus ("Northwestern Argentina lizard") is a genus of theropod dinosaur genus of the late Campanian-Maastrichtian (Late Cretaceous).

Discovery[edit]

Restoration

It was a small (less than eight feet long) theropod, specifically a ceratosaur, discovered by Jaime Powell and José Bonaparte from the Lecho Formation of Salta Province, Argentina, dating to the late Cretaceous period (early Maastrichtian stage, about 70 Ma ago). The type species, Noasaurus leali, was described by Bonaparte and Powell in 1980.

Classification[edit]

Size compared with humans
Reconstructed hypothetical skull based on Masiakasaurus

It was a close relative of the larger abelisaurids; they are both derived from the same basal abelisauroid ancestor. While originally reported to have a raptorial 'sickle claw' on the foot similar to the claws of the more advanced dromaeosaurids, subsequent studies showed that the claw actually came from the hand.[1]

The following cladogram is based on the phylogenetic analysis conducted by Rauhut and Carrano in 2016, showing the relationships of Elaphrosaurs among the noasaurids:[2]

Abelisauroidea 

Abelisauridae


 Noasauridae 

Laevisuchus



Deltadromeus



Elaphrosaurinae

Limusaurus




CCG 20011



Elaphrosaurus




Noasaurinae

Velocisaurus



Noasaurus



Masiakasaurus






See also[edit]

References[edit]

  • J. F. Bonaparte and J. E. Powell. 1980. A continental assemblage of tetrapods from the Upper Cretaceous beds of El Brete, northwestern Argentina (Sauropoda-Coelurosauria-Carnosauria-Aves). Mémoires de la Société Géologique de France, Nouvelle Série 139:19-28
  1. ^ Agnolin, F.L. and Chiarelli, P. (2010). "The position of the claws in Noasauridae (Dinosauria: Abelisauroidea) and its implications for abelisauroid manus evolution." Paläontologische Zeitschrift, published online 19 November 2009. doi:10.1007/s12542-009-0044-2
  2. ^ Rauhut, O.W.M., and Carrano, M.T. (2016). The theropod dinosaur Elaphrosaurus bambergi Janensch, 1920, from the Late Jurassic of Tendaguru, Tanzania. Zoological Journal of the Linnean Society, (advance online publication) doi:10.1111/zoj.12425

Sources[edit]

  • Lessem, D. (May 1993). "Jose Bonaparte: Master of the Mesozoic". Omni.