(Named after Agustin Martinelli, the discoverer).
Named By: Josť Bonaparte - 1999.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Sauropodomorpha, Diplodocoidea/Titanosauridae?
Species: A. ligabuei (type).
Size: Estimated 15 meters long.
Known locations: Argentina, Neuquen Province - Lohan Cura Formation.
Time period: Aptian to Albian of the Cretaceous.
Fossil representation: Partial remains including a fibula and tibia (bones of the lower hind leg), very fragmentary femur (upper hind leg bone), five metatarsals, partial vertebrae and the associated back armour of plates and spikes.
with many sauropod
dinosaurs, Agustinia is
known from incomplete
remains. Some of these remains however revealed a startling
revelation in that this sauropod had what appeared to be armour along
its back similar in appearance to the plates of Stegosaurus,
herbivorous but completely different kind of dinosaur. This is in
particular reference to the plates that would have been on the back of
the neck of Agustinia, although these plates were
at a right angle
to how they would have been arranged in Stegosaurus
that from the side they would have looked thin, but from the front
you would have seen the full shape. However, later studies now suggest
that this plates are actually fragments of the ribs and hips, and if
this is true, then Agustinia did not have armoured
The phylogenetic position of Agustinia has been difficult to establish as the few bones known for the genus display a combination of diplodocid and titanosaurid features. To make things even more difficult both of these groups of dinosaurs are known to have roamed South America during the Cretaceous. Agustinia was first named in 1998 as Augustia, but this was later found to have already been used for another creature, hence the change to Agustinia in 1999.
- An armoured sauropod from the Aptian of northern Patagonia, Argentina. - J. F. Bonaparte. In Proceedings of the Second Gondwanan Dinosaur Symposium Tokyo: National Science Museum Monographs Y. Tomida, T. H. Rich & P. Vickers-Rich (Eds). - 1999.
- Osteology of the Late Jurassic Portuguese sauropod dinosaur Lusotitan atalaiensis (Macronaria) and the evolutionary history of basal titanosauriforms. - Zoological Journal of the Linnean Society, 168, 98–206. - P. D. Manion, P. Upchurch, R. N. Barnes & O. Mateus - 2013.
- Bone histology sheds light on the nature of the ‘dermal armor’ of the enigmatic sauropod dinosaur Agustinia ligabuei Bonaparte, 1999. - The Science of Nature. 104 (1) - F. Bellardini & I. A. Cerda - 2017.