78151 20200117221638.0 doi 10.4202/app.00524.2018 sideral 110841 ART-2018-110841 eng (orcid)0000-0003-1732-9155 Canudo Sanagustín, José Ignacio Universidad de Zaragoza A new rebbachisaurid sauropod from the Aptian–Albian, Lower Cretaceous Rayoso Formation, Neuquén, Argentina 2018 Access copy available to the general public Unrestricted Rebbachisaurids are a group of basal diplodocimorph sauropods that diversified in Gondwana at the end of the Early Cretaceous and the beginning of the Late Cretaceous. It is a group of great palaeobiogeographical interest, for it clearly illustrates various processes of dispersal throughout Gondwana and to Laurasia prior to the breakup of Africa and South America. However, the relationships within the group are still under discussion owing to the scarcity of cranial material that would help clarify them. In the present paper we describe the new rebbachisaurid Lavocatisaurus agrioensis gen. et sp. nov. from the Aptian–Albian (Lower Cretaceous) of Neuquén (Argentina). Remains have been recovered belonging to an adult specimen (holotype) and two immature specimens (paratypes). Taken together, almost all the bones of the taxon are represented, including most of the cranium. Lavocatisaurus agrioensis gen. et sp. nov. is the first rebbachisaurid from Argentina with an almost complete cranium, making it possible to recognize differences with respect to other rebbachisaurids, such as the highly derived Nigersaurus. Among its most notable characters are the presences of a large preantorbital fenestra and maxillary teeth that are significantly larger than those of the dentary. Our phylogenetic study places Lavocatisaurus amongst basal rebbachisaurids, as the sister lineage to Khebbashia (the clade formed by Limaysaurinae + Rebbachisaurinae). This position, which is somewhat more derived than that previously suggested for Comahuesaurus and Zapalasaurus (the Argentinean rebbachisaurids closest in geographical and geological terms), reaffirms the presence of different basal rebbachisaurid lineages in the Early Cretaceous of Patagonia. info:eu-repo/grantAgreement/ES/MINECO/CGL2017-85038-P info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 1.639 2018 PALEONTOLOGY 17 / 56 = 0.304 2018 Q2 T1 0.764 2018 Paleontology 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Carballido, J. Garrido, A. Salgado, L. 2000 655 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Paleontología 63, 4 (2018), 679-691 Acta Palaeontol. Pol. ACTA PALAEONTOLOGICA POLONICA 0567-7920 529292 http://zaguan.unizar.es/record/78151/files/texto_completo.pdf Versión publicada 109741 http://zaguan.unizar.es/record/78151/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:78151 articulos driver 2020-01-17-22:02:58 ARTICLE