@ARTICLE{TreeBASE2Ref21086, author = {Jos? L. Carballido and Alberto C. Garrido and Jos? Ignacio Canudo and Leonardo Salgado}, title = {Redescription of Rayososaurus agrioensis Bonaparte (Sauropoda, Diplodocoidea), a rebbachisaurid from the early Late Cretaceous of Neuqu?n.}, year = {2010}, keywords = {Cenomanian; Palaeobiogeography; Patagonia; Rayososaurus; Rebbachisauridae}, doi = {10.1016/j.geobios.2010.01.004}, url = {http://graemetlloyd.com/matr.html}, pmid = {}, journal = {Geobios}, volume = {43}, number = {5}, pages = {493--502}, abstract = {The material belonging to the holotype of Rayososaurus agrioensis Bonaparte is redescribed. The great development of the acromion process, directed in a markedly posterior direction, and the ventral margin of the scapula with a strong ventrodistal expansion, interpreted as autapomorphies of the taxon, justify the validity of the species. Although the material is rather fragmentary, the racquet-shaped scapula, the distal expansion positioned at the same height as the proximal expansion, and the well-developed acromion process allow the taxon to be included within Rebbachisauridae. At the same time, the angle of less than 90˚ between the coracoid articulation and the scapular blade, together with the great development of the acromion process of the scapula, justify its inclusion in a clade situated as a sister group of Cathartesaura. On the basis of the stratigraphic calibration of the phylogenetic analysis, an important diversification event of the rebbachisaurids is deduced during the Hauterivian- Barremian. In this context, the presence of two monophyletic groups, one of which comprises African-European taxa and the other South American taxa, would place the definitive separation of South America and Africa within this time interval.} }

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