A new titanosaur sauropod from the Upper Cretaceous of Neuquén is described, Choconsaurus baileywillisi gen. et sp. nov. The species is represented by a nearly complete series of dorsal vertebrae as well as other parts of the skeleton. The material comes from the locality of Villa El Chocón and stratigraphically from the Huincul Formation, whose age has been estimated as upper Cenomanian. The new taxon presents many autapomorphic features, including the presence of a small notch on the dorsal margin of the posterior articular surface of the cervical centra, accessory articulations lateral to the hyposphene, which are more developed in the anterior dorsal vertebrae, midand posterior dorsal vertebrae with an accessory lamina placed between the posterior centrodiapophyseal and the accessory posterior centrodiapophyseal laminae, and a hyposphene on anterior caudal vertebrae. Phylogenetic analysis recovers Choconsaurus baileywillisi as a non-eutitanosaur titanosaur, taxa that are well represented in the lower Upper Cretaceous of Patagonia. Choconsaurus baileywillisi is, to date, the most complete non-eutitanosaur titanosaur.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 55 • No. 1