Mostrar el registro sencillo del ítem
dc.contributor.author
Martínez, Rubén Darío
dc.contributor.author
Lamanna, Matthew C.
dc.contributor.author
Novas, Fernando Emilio
dc.contributor.author
Ridgely, Ryan C.
dc.contributor.author
Casal, Gabriel
dc.contributor.author
Martínez, Javier E.
dc.contributor.author
Vita, Javier R.
dc.contributor.author
Witmer, Lawrence M.
dc.date.available
2017-06-05T19:37:09Z
dc.date.issued
2016-04-26
dc.identifier.citation
Martínez, Rubén Darío; Lamanna, Matthew C.; Novas, Fernando Emilio; Ridgely, Ryan C.; Casal, Gabriel; et al.; A basal lithostrotian titanosaur (Dinosauria: Sauropoda) with a complete skull: Implications for the evolution and paleobiology of titanosauria; Public Library Of Science; Plos One; 11; 4; 26-4-2016
dc.identifier.issn
1932-6203
dc.identifier.uri
http://hdl.handle.net/11336/17517
dc.description.abstract
We describe Sarmientosaurus musacchioi gen. et sp. nov., a titanosaurian sauropod dinosaur from the Upper Cretaceous (Cenomanian - Turonian) Lower Member of the Bajo Barreal Formation of southern Chubut Province in central Patagonia, Argentina. The holotypic and only known specimen consists of an articulated, virtually complete skull and part of the cranial and middle cervical series. Sarmientosaurus exhibits the following distinctive features that we interpret as autapomorphies: (1) maximum diameter of orbit nearly 40% rostrocaudal length of cranium; (2) complex maxilla - lacrimal articulation, in which the lacrimal clasps the ascending ramus of the maxilla; (3) medial edge of caudal sector of maxillary ascending ramus bordering bony nasal aperture with low but distinct ridge; (4) ´tongue-like´ ventral process of quadratojugal that overlaps quadrate caudally; (5) separate foramina for all three branches of the trigeminal nerve; (6) absence of median venous canal connecting infundibular region to ventral part of brainstem; (7) subvertical premaxillary, procumbent maxillary, and recumbent dentary teeth; (8) cervical vertebrae with ´strut-like´ centroprezygapophyseal laminae; (9) extremely elongate and slender ossified tendon positioned ventrolateral to cervical vertebrae and ribs. The cranial endocast of Sarmientosaurus preserves some of the most complete information obtained to date regarding the brain and sensory systems of sauropods. Phylogenetic analysis recovers the new taxon as a basal member of Lithostrotia, as the most plesiomorphic titanosaurian to be preserved with a complete skull. Sarmientosaurus provides a wealth of new cranial evidence that reaffirms the close relationship of titanosaurs to Brachiosauridae. Moreover, the presence of the relatively derived lithostrotian Tapuiasaurus in Aptian deposits indicates that the new Patagonian genus represents a ´ghost lineage´ with a comparatively plesiomorphic craniodental form, the evolutionary history of which is missing for at least 13 million years of the Cretaceous. The skull anatomy of Sarmientosaurus suggests that multiple titanosaurian species with dissimilar cranial structures coexisted in the early Late Cretaceous of southern South America. Furthermore, the new taxon possesses a number of distinctive morphologies - such as the ossified cervical tendon, extremely pneumatized cervical vertebrae, and a habitually downward- facing snout - that have rarely, if ever, been documented in other titanosaurs, thus broadening our understanding of the anatomical diversity of this remarkable sauropod clade. The latter two features were convergently acquired by at least one penecontemporaneous diplodocoid, and may represent mutual specializations for consuming low-growing vegetation.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Public Library Of Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Sarmientosaurus Musacchioi
dc.subject
Titanosaur
dc.subject
Cretaceous
dc.subject
Patagonia
dc.subject.classification
Paleontología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
A basal lithostrotian titanosaur (Dinosauria: Sauropoda) with a complete skull: Implications for the evolution and paleobiology of titanosauria
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-05T14:49:37Z
dc.journal.volume
11
dc.journal.number
4
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Martínez, Rubén Darío. Universidad Nacional de la Patagonia; Argentina
dc.description.fil
Fil: Lamanna, Matthew C.. Carnegie Museum Of Natural History; Estados Unidos
dc.description.fil
Fil: Novas, Fernando Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "bernardino Rivadavia"; Argentina
dc.description.fil
Fil: Ridgely, Ryan C.. Ohio University College Of Osteopathic Medicine; Estados Unidos
dc.description.fil
Fil: Casal, Gabriel. Universidad Nacional de la Patagonia; Argentina
dc.description.fil
Fil: Martínez, Javier E.. Hospital Regional de Comodoro Rivadavia; Argentina
dc.description.fil
Fil: Vita, Javier R.. Resonancia Magnética Borelli; Argentina
dc.description.fil
Fil: Witmer, Lawrence M.. Ohio University College Of Osteopathic Medicine; Estados Unidos
dc.journal.title
Plos One
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1371/journal.pone.0151661
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0151661
Archivos asociados