Rubén D. Juárez Valieri and Jorge O. Calvo (2011). \\\\\\\"Revision of MUCPv 204, a Senonian Basal Titanosaur from Northern Patagonia\\\\\\\". Paleontología y dinosarios desde América Latina: 143–152.

Abstract: The titanosaurian sauropod comprises the most diverse group of terrestrial tetrapods from the Cretaceous of South America. With around thirty valid species, these dinosaurs covered many of the herbivorous eological niches in this continent (Salgado e Bonaparte, 2007). One of the first characters noted for the titanosaurians was the existence of procoelic caudal vertebrae, and originally was utilized in the diagnosis of the type of the group, the genus Titanosaurus. With a more complete fossil record, was evident that this character was distributed in a more compresive group, the traditional Titanosauridae (Powell, 2003).

Salgado and Calvo (1993) described a notable partial skeleton of a titansaurian (MUCPv 204) that contained the tipical procoelic caudals restricted to the anterior caudals, but with “amphiplatyan” middle caudal vertebrae. These remains were recovered from sediments of Late Cretaceous age, and this animal was considered as a late survivor of basal titanosaur lineages, although their stratigraphic position was controversial (Juárez Valieri et al., this volume). A review of the type locality allow us to specify the stratigraphical unit of procedence. Here, we redescribe the specimen MUCPv 204, generating comparisson with new titanosaur taxa [Traukutitan eocaudata] with similar morphological conditions, and discusse the biostratigraphic implicances of this new taxon.

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