Cretaceous Sauropods from the Sahara and the Uneven Rate of Skeletal Evolution Among Dinosaurs

Sereno, Paul C.; Beck, A. W.; Dutheil, Didier B.; Larsson, Hans C. E.; Lyon, Gabrielle H.; Moussa, Bourahima; Sadleir, Rudyard W.; Sidor, Christian A.; Varricchio, David J.; Wilson, Gregory P.; Wilson, Jeffrey A.

doi:10.1126/science.286.5443.1342

Cited by 217 publications

(186 citation statements)

References 27 publications

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“…The specimen shows one unusual character in common with Brachiosaurus, a V-shaped first chevron that is anteroposteriorly flattened (Janensch 1950: figs 109, 123). In other sauropods, such as Camarasaurus (Osborn & Mook 1921;McIntosh et al 1996) or Apatosaurus (Upchurch et al 2004b), this chevron is typically Y-shaped and does not differ significantly from the other chevrons, or is strongly modified, as in Jobaria (Sereno et al 1999). However, first chevrons have been described in only few taxa, so more material is needed to establish this character as a brachiosaurid synapomorphy.…”

Section: Discussionmentioning

confidence: 99%

A brachiosaurid sauropod from the Late Jurassic Cañadón Calcáreo Formation of Chubut, Argentina

Rauhut¹

2006

Foss. Rec.

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Fragmentary sauropod remains from the Late Jurassic (Tithonian) Cañ adó n Calcá reo Formation of Chubut, Argentinean Patagonia, are derived from a taxon of large size, but with very slender forelimbs. The characters of the caudal vertebrae, such as anteriorly placed neural arches, slender forelimbs, and large deltopectoral crest of the humerus indicate that this material represents the first brachiosaurid sauropod reported from South America. This occurrence confirms an almost global distribution of brachiosaurids in the Late Jurassic and thus indicates a rapid diversification and dispersal of this group after its origin, presumable in the late Middle Jurassic.Schlü sselwö rter: Oberer Jura, Gondwana, Sü damerika, Dinosauria, Brachiosauridae. ZusammenfassungFragmentarische Sauropoden-Reste aus der oberjurassischen Cañ adó n Calcá reo Formation (Tithon) in Chubut, argentinisches Patagonien, reprä sentieren ein großes Taxon mit sehr schlanken Extremitä ten. Die Charakteristika der Schwanzwirbel, wie etwa die vorne auf den Centra sitzenden Neuralbö gen, schlanke Vorderextremitä ten und der sehr gut entwickelte Deltopectoral-Kamm auf dem Humerus deuten darauf hin, dass es sich um den ersten Nachweis eines Brachiosauriden aus Sü damerika handelt. Dieser Nachweis betont die offenbar fast globale Verbreitung dieser Gruppe im oberen Jura und deutet auf ein rasche Verbreitung und Diversifikation dieser Gruppe nach ihrer Entstehung, vermutlich im spä ten Mitteljura hin.

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Section: Discussionmentioning

confidence: 99%

A brachiosaurid sauropod from the Late Jurassic Cañadón Calcáreo Formation of Chubut, Argentina

Rauhut¹

2006

Foss. Rec.

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“…The absence of middle chevrons without anterior and posterior process led Yagüe et al (2006) to refer this sauropod to Macronaria. Nevertheless, this feature is also present in the non-neosauropod Jobaria (Sereno et al, 1999). The available elements do not present features supporting its placement within Macronaria, so that we prefer an identification of this material as Eusauropoda indet.…”

Section: Figurementioning

confidence: 94%

Upper Jurassic sauropod record in the Lusitanian Basin (Portugal): Geographical and lithostratigraphical distribution

Mocho

Royo–Torres²,

Escaso

et al. 2017

Palaeontologia Electronica

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“…2, 4b) (Canudo and Salgado 2003). According to Medeiros and Schultz (2004), some specimens from the Alcân-tara Formation have affinities with "Rebbachisaurus" tamesnensis (Lapparent 1960), a North African taxon with uncertain status (Calvo and Salgado 1995, Sereno et al 1999, Upchurch et al 2004, and with the better known Rayososaurus tessonei. The latter has been referred to Limaysaurus by Salgado et al (2004) and recorded in the Aptian-Cenomanian of Argentina (Calvo and Salgado 1995).…”

Section: São Luís-grajaú Basinmentioning

confidence: 99%

Mesozoic dinosaurs from Brazil and their biogeographic implications

Bittencourt

Langer

2011

An. Acad. Bras. Ciênc.

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The record of dinosaur body-fossils in the Brazilian Mesozoic is restricted to the Triassic of Rio Grande do Sul and Cretaceous of various parts of the country. This includes 21 named species, two of which were regarded as nomina dubia, and 19 consensually assigned to Dinosauria. Additional eight supraspecific taxa have been identified based on fragmentary specimens and numerous dinosaur footprints known in Brazil. In fact, most Brazilian specimens related to dinosaurs are composed of isolated teeth and vertebrae. Despite the increase of fieldwork during the last decade, there are still no dinosaur body-fossils of Jurassic age and the evidence of ornithischians in Brazil is very limited. Dinosaur faunas from this country are generally correlated with those from other parts of Gondwana throughout the Mesozoic. During the Late Triassic, there is a close correspondence to Argentina and other south-Pangaea areas. Mid-Cretaceous faunas of northeastern Brazil resemble those of coeval deposits of North Africa and Argentina. Southern hemisphere spinosaurids are restricted to Africa and Brazil, whereas abelisaurids are still unknown in the Early Cretaceous of the latter. Late Cretaceous dinosaur assemblages of south-central Brazil are endemic only to genus or, more conspicuously, to species level, sharing closely related taxa with Argentina, Madagascar, Indo-Pakistan and, to a lesser degree, continental Africa.

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Cretaceous Sauropods from the Sahara and the Uneven Rate of Skeletal Evolution Among Dinosaurs

Cited by 217 publications

References 27 publications

A brachiosaurid sauropod from the Late Jurassic Cañadón Calcáreo Formation of Chubut, Argentina

A brachiosaurid sauropod from the Late Jurassic Cañadón Calcáreo Formation of Chubut, Argentina

Upper Jurassic sauropod record in the Lusitanian Basin (Portugal): Geographical and lithostratigraphical distribution

Mesozoic dinosaurs from Brazil and their biogeographic implications

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