Rinconsaurus caudamirus gen. et sp. nov., a new titanosaurid (Dinosauria, Sauropoda) from the Late Cretaceous of Patagonia, Argentina

Calvo, Jorge O.; Riga, Bernardo J. González

doi:10.4067/s0716-02082003000200011

Cited by 102 publications

(91 citation statements)

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“…In particular, most dinosaur species from Argentina have been found in Upper Cretaceous strata of the Neuquén Group, northern Patagonia. These findings comprise numerous sauropods and theropods and have significance from both systematic and phylogenetic viewpoints (e.g., Bonaparte, 1991;Novas, 1996;Novas, 1997;Novas and Puerta, 1997;Salgado et al, 1997;Powell, 2003;Wilson, 2002;Calvo and González Riga, 2003;Calvo et al, 2004;Curry Rogers, 2005;Coria and Currie, 2006;Calvo et al, 2007;González Riga et al, 2008;González Riga et al, 2009). In southern Mendoza, sauropod remains are relatively abundant.…”

Section: Introductionmentioning

confidence: 97%

Bone microstructure and diagenesis of saurischian dinosaurs from the Upper Cretaceous (Neuquén Group), Argentina

Previtera

2017

andgeo

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ABSTRACT. The Neuquén Basin in northwestern Patagonia, Argentina, holds the most important record of Cretaceous dinosaurs in South America.The Neuquén Group (Upper Cretaceous) is the richest dinosaur-bearing unit of the basin. It comprises the Río Limay, the Río Neuquén and the Río Colorado subgroups. In this study, dinosaur remains from the Río Neuquén and the Río Colorado subgroups outcropping in Mendoza are examined. In this group, isolated, disarticulated or partially articulated sauropods and theropods are abundant. However, little is known about the diagenetic history of fossil assemblages. In southern Mendoza, three fossiliferous sites were found in the areas of Paso de las Bardas (Quebrada Norte) and Cerro Guillermo (CG1, CG2). This study aims to add to the knowledge of diagenetic processes involving dinosaur remains from the Neuquén Group, as well as their relation to the depositional environment. Histologic features and diagenetic processes of dinosaur bones were analyzed through thin sections in order to interpret the degree of taphonomic alteration. The fossil-diagenetic processes inferred include substitution, fracturing, plastic deformation and different permineralization events. Combined analyses through X-ray diffractometry (XRD) and petrographic studies reveal the substitution of hydroxyapatite by francolite. The presence of fluorine -in one of the cases-suggests a link between the elemental composition and depositional environments: floodplain and fluvial channel. Permineralization stages include infilling of vascular canals, trabeculae and fractures with iron oxides and iron carbonate minerals during the burial history. This contribution represents an integral approach to the study of Cretaceous dinosaurs for assessing the diagenetic changes in the bone microstructure and the differential preservation of fossil remains in fluvial environments.

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Section: Introductionmentioning

confidence: 97%

Bone microstructure and diagenesis of saurischian dinosaurs from the Upper Cretaceous (Neuquén Group), Argentina

Previtera

2017

andgeo

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“…The heart-shaped transverse section and the anteroposterior compression of this fossil indicate its affinity to the genera Aeolosaurus and Gondwanatitan. On the other hand, this vertebra has pleurocoel-like depressions on its lateral surfaces, like those described in Aeolosaurus rionegrinus, A. colhuehuapiensis and Rinconsaurus caudamirus (Calvo & Riga, 2003;Powell, 2003;Casal et al, 2007), while in the caudal vertebrae of the type specimens of G. faustoi, Trigonosaurus pricei and Baurutitan britoi, this feature is absent (Kellner & Azevedo, 1999;Campos et al, 2005;Kellner et al, 2005). Furthermore, considered Gondwanatitan a junior synonym of Aeolosaurus, and have reported this genus from the Serra da Galga Member of the Marília Formation in the Triângulo Mineiro.…”

Section: Discussionmentioning

confidence: 67%

Fossils of titanosaurs (Dinosauria, Sauropoda) from a new outcrop in Triângulo Mineiro, southeastern Brazil

Lopes¹,

Buchmann²

2008

Rev. bras. paleontol.

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-The Triângulo Mineiro area, in southwestern Minas Gerais State, southeastern Brazil, has been known for decades for its vertebrate fossils, mostly of dinosaurs. Described here are fossils of sauropod dinosaurs from a new fossiliferous outcrop in the region, correlated with the Echaporã Member (Campanian-Maastrichtian) of the Marília Formation. The fossils are a right tibia, two procoelous vertebral centra and a right coracoid, besides a possible phalange and several unidentified fragments, Although the zygapophyses and neural spines had not been preserved, the procoelous vertebrae show that the fossils belonged to sauropods of the clade Titanosauridae. The best preserved vertebra is heartshaped in cross-section, has its ventral half anteroposteriorly compressed and has pleurocoel-like depressions on its lateral cranial portion, features that indicate affinity with the genus Aeolosaurus.Key words: Aeolosaurus, Titanosauridae, Late Cretaceous, Marília Formation, Triângulo Mineiro.RESUMO -A área do Triângulo Mineiro, no sudoeste do Estado de Minas Gerais, Brasil, é conhecida há décadas por seus fósseis de vertebrados, principalmente dinossauros. Aqui são descritos fósseis de dinossauros saurópodes provenientes de um novo afloramento fossilífero na região, correlacionado ao Membro Echaporã (Campaniano-Maastrichtiano) da Formação Marília. Os fósseis compreendem uma tíbia direita, duas vértebras procélicas e um coracóide direito, além de uma possível falange além de diversos fragmentos não identificados. Embora as zigapófises e espinhas neurais não tenham sido preservadas, as vértebras procélicas mostram que pertenceram a saurópodes do clado Titanosauria. A vértebra melhor preservada apresenta formato cordiforme em seção transversal, tem a metade ventral comprimida ântero-posteriormente e depressões pleurocélicas nas laterais da sua porção cranial, características que sugerem afinidade com o gênero Aeolosaurus. Palavras-chave:Aeolosaurus, Titanosauridae, Neocretáceo, Formação Marília, Triângulo Mineiro.

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“…y Aeolosaurus maximus Santucci & Arruda-Campos, 2011, provenientes de Brasil (Kellner & Azevedo, 1999Kellner et al, 2006;Santucci & Arruda-Campos, 2011), y Aeolosaurus rionegrinus Powell, 1987, A. colhuehuapensis Casal et al, 2007, Panamericansaurus schroederi Calvo & Porfi ri, 2010 y Rinconsaurus caudamirus Calvo & González Riga, 2003, provenientes de Argentina (Powell, 1987(Powell, , 2003Casal et al, 2007;Calvo & González Riga, 2003). Asimismo, a este grupo se asignan otros registros basados en restos aislados del Cretácico Superior de Brasil (véase Martinelli et al, 2011) y Argentina (e.g.…”

Section: Gondwanatitan Faustoiunclassified

“…Asimismo, Juárez Valieri & Bellardini (2012) plantean dudas sobre la validez del género Panamericansaurus Calvo & Porfi ri, 2010 (pero no de la especie), por lo que sugieren que este género podría ser un sinónimo de Aeolosaurus Powell, 1987. Rincosaurus caudamirus proveniente de Cañadón Río Seco (Calvo & González Riga, 2003), Rincón de los Sauces, Neuquén, Formación Anacleto (Garrido, 2010), también ha sido relacionado con los Aeolosaurini (e.g. Calvo & González Riga, 2003;Santucci & Arruda-Campos, 2011), sin embargo, el análisis de Calvo et al (2007) En el presente trabajo se dan a conocer los restos de un saurópodo titanosaurio provenientes del Yacimiento Narambuena, Rincón de los Sauces, Provincia de Neuquén, Argentina (Figura 1), cuyos niveles portadores son asignados a la Formación Plottier, Grupo Neuquén, Cretácico Superior (Santoniano inferior; Garrido, 2010).…”

Section: Gondwanatitan Faustoiunclassified

Registro de un dinosaurio Aeolosaurini (Sauropoda, Titanosauria) en el Cretácico Superior (Formación Plottier) del norte de la Provincia de Neuquén, Argentina, y comentarios sobre los Aeolosaurini sudamericanos

Filippi¹,

Martinelli²,

Garrido³

2013

Rev. bras. paleontol.

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Rinconsaurus caudamirus gen. et sp. nov., a new titanosaurid (Dinosauria, Sauropoda) from the Late Cretaceous of Patagonia, Argentina

Cited by 102 publications

References 0 publications

Bone microstructure and diagenesis of saurischian dinosaurs from the Upper Cretaceous (Neuquén Group), Argentina

Bone microstructure and diagenesis of saurischian dinosaurs from the Upper Cretaceous (Neuquén Group), Argentina

Fossils of titanosaurs (Dinosauria, Sauropoda) from a new outcrop in Triângulo Mineiro, southeastern Brazil

Registro de un dinosaurio Aeolosaurini (Sauropoda, Titanosauria) en el Cretácico Superior (Formación Plottier) del norte de la Provincia de Neuquén, Argentina, y comentarios sobre los Aeolosaurini sudamericanos

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