Rebbachisaurus

Live reconstruction of Rebbachisaurus

  • Rebbachisaurus garasbae

Rebbachisaurus is a genus diplodocider sauropods, which during the late Early Cretaceous ( Albian ) lived in Africa.

The holotype was found in the Tegana lineup in Morocco and described in 1954 by René Lavocat. The only way is Rebbachisaurus garasbae.

Another type that was found in Niger, was described in 1960 as Rebbachisaurus tamesnensis, but is now regarded as a synonym of Nigersaurus. A third type, Rebbachisaurus tessonei, from Argentina was described in 1995 by Jorge Calvo and Leonardo Salgado, but most of today's authors suggest that Rebbachisaurus was tessonei an independent genus, Limaysaurus; Calvo and Salgado, however, keep as nomen dubium Limaysaurus.

Features

Like all representatives of his group, he was a large, four-legged herbivore with a long neck and tail. Its length is estimated at 20 m. Probably reached Rebbachisaurus a weight of about 10 to 20 tons.

Remarkable are the spinous processes on the back; these probably formed a 1.5 m high sail, similar to Ouranosaurus and Spinosaurus.

System

Previously conjectured that Rebbachisaurus was a genus of Brachiosauridae or Camarasauridae. Later they wrote him to the Dicraeosauriden. The discovery of similar physique from Limaysaurus in 1997 José Bonaparte proposed a separate family Rebbachisauridae before within the superfamily of Diplodocoidea to the genera Rebbachisaurus and Limaysaurus. Withlock (2011) came to the conclusion that Rebbachisaurus was a basal Rebbachisauride and the sister taxon of a group derived Rebbachisauriden forms, which includes the Nigersaurinae ( Nigersaurus, Zapalasaurus and Demandasaurus ), the Limaysaurinae ( Limaysaurus and Cathartes aura ). Below is a cladogram by Withlock (2011):

Histriasaurus

Rebbachisaurus

Zapalasaurus

Demandasaurus

Nigersaurus

Cathartes aura

Limaysaurus

Palaeobiogeography

Since the discovery of nearly identical Rayososaurus in South America Rebbachisaurus is attributed to a certain paleogeographic significance: it is interpreted as evidence that there was a land bridge between Africa and South America during the Cretaceous period. One of the two species probably evolved from the other, when they immigrated into a new land mass (principle of allopatric speciation ).

Swell

  • Upchurch, P., Barrett, P. M., & Dodson, P. ( 2004). " Sauropoda ". In DB Weishampel, H. Osmólska, & P. Dodson: The Dinosauria ( 2nd edition ). University of California Press, Berkeley, pp. 259-322.
  • 39 ° Congresso Brasileiro Geologico, Anais (7): 392-393 (PDF, 16 kB)
  • Lavocat, R. ( 1954), Sur les Dinosauriens you continental intercalaire of Kem -Kem de la Daoura. C. R. 19th Internat. Geol Congr. 1952 Part 15; 65-68.
  • Monbaron, M. (1978), Nouveaux ossements de dinosauriens de grande taille dans le bassin de jurassico - cretace Taguelft (Atlas de Beni Mellal, Maroc ). Comptes Rendus Hebdomadaires Des Seances De L' academie Des Sciences Serie D Sciences Naturelles 287 (14); From 1277 to 1279.
  • Meyendorff, AF de Lapparent, CL Camp and De - Ricqles, A. ( 1994), The first paleohistological studies on saharian dinosaurs. Annales De Paleontology 80 (2); 143-153.
  • Calvo, J.O. and Salgado, L. (1995), Rebbachisaurus tessonei sp. nov. a new Sauropoda from the Albian - Cenomanian of Argentina; new evidence on the origin of Diplodocidae. Gaia 11; 13-33.
Mya (unit) Fossil Jorge O. Calvo Dicraeosauridae Cathartesaura Digital Object Identifier
674812
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