Jobaria was a sauropod dinosaur discovered in the Sahara Desert in 1997. It was named after "Jobar", a creature of local legends, and is thought to have been about 18 metres long. It was found in the Tiourarén Formation, originally thought to represent the Hauterivian to Barremian stages of the early Cretaceous Period, or approximately 136 to 125 million years ago (Sereno et al. 1994). However, re-interpretation of the sediments showed that they are probably mid-Jurassic in age, dating Jobaria to the Bathonian to Oxfordian stages, between 164 and 161 mya.
Cast at Montshire Museum of SciencePaul Sereno concluded, after comparing the ratios of humerus and femur circumferences in Jobaria to extant elephants, that Jobaria may have been able to rear up on its hind legs. As the weight distribution of Jobaria indicates that it was supported by the rear limbs rather than the forelimbs (as in elephants), it has been speculated that as elephants can rear up, then Jobaria would have been able to more easily.
- Sereno, P.C., Beck, A.L., Dutheil, D.B., Larsson, H.C.E., Lyon, G.H., Moussa, B., Sadleir, R.W., Sidor, C.A., Varricchio, D.J., Wilson, G. P. & Wilson, J.A., (1999), Cretaceous Sauropods from the Sahara and the Uneven Rate of Skeletal Evolution Among Dinosaurs, Science 286(5443): 1342-1347 (Nov 12 1999)
- Upchurch, P., Barrett, P.M., and Dodson, P. 2004. Sauropoda. In The Dinosauria, 2nd edition. D. Weishampel, P. Dodson, and H. Osmólska (eds.). University of California Press, Berkeley.
- Fantastic Facts About Dinosaurs (ISBN 0-7525-3166-2)