An articulated titanosaur from Patagonia (Argentina): New evidence of neosauropod pedal evolution

Riga, Bernardo J. González; Calvo, Jorge O.; Porfiri, Juan D.

doi:10.1016/j.palwor.2007.08.003

Cited by 42 publications

(50 citation statements)

References 10 publications

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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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“…This underlines that the exact pedal phalangeal formula is still in question in many genera, and that this formula might be inter-or even intraspecifically variable. Upchurch (1995Upchurch ( , 1998 and Upchurch et al (2004a) assumed the phalangeal formula to be 2-3-4-2-1 in neosauropods, which was further reduced in derived titanosaurs to 2-2-2-1-0 (Borsuk-Bialynicka, 1977;González Riga et al, 2008;Nair and Salisbury, 2012). The exact phalangeal formula of Camarasaurus is unknown, because no complete pes has been described up to now (McIntosh et al, 1996a;ET, pers.…”

Section: Pesmentioning

confidence: 99%

“…Due to the amount of preserved bones, complete skeletons, and published descriptions, Camarasaurus is one of the best known sauropod genera worldwide (Harris, 2006;Foster, 2007). However, manual and pedal elements have rarely been found, and if so, they were mostly disarticulated (Wilson, 2005a(Wilson, , 2005bGonzález Riga et al, 2008). Studies on these bones are therefore scarce; even the previously mentioned monographs lack detailed descriptions of individual bones of the autopodia.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, Gilmore's (1936) monograph on Apatosaurus and BorsukBialynicka's (1977) paper on Opisthocoelicaudia include adequate descriptions of manus and pes elements. Recently, several publications yielded additional important information on manual and pedal shape in sauropods (McIntosh et al, 1992(McIntosh et al, , 1996aAverianov et al, 2002;Bonnan, 2003Bonnan, , 2005Martínez et al, 2004;Apesteguía, 2005;Bedell and Trexler, 2005;Bonaparte et al, 2006;Harris, 2007;Läng and Goussard, 2007;González Riga et al, 2008;Curry Rogers, 2009;Hocknull et al, 2009;D'Emic et al, 2011;Nair and Salisbury, 2012;Poropat et al, 2015aPoropat et al, , 2015b.…”

Section: Introductionmentioning

confidence: 99%

“…Other recent publications deal with the functional morphology of the feet (e.g., Gallup, 1989;Christiansen, 1997c;Bonnan, 2005;Fowler and Hall, 2011), or study the evolution of manual and pedal shape (e.g., Bonnan, 2003Bonnan, , 2005Apesteguía, 2005;Bonnan and Yates, 2007;Läng and Goussard, 2007;González Riga et al, 2008;Nair and Salisbury, 2012). However, none of these studies was based on a complete set of articulated fore and hind feet of the same individual.…”

Section: Introductionmentioning

confidence: 99%

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Articulated bone sets of manus and pedes of Camarasaurus (Sauropoda, Dinosauria)

Tschopp

Wings

Frauenfelder

et al. 2015

Palaeontologia Electronica

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Tschopp, Emanuel, Wings, Oliver, Frauenfelder, Thomas, and Brinkmann, Winand. 2015. Articulated bone sets of manus and pedes of Camarasaurus (Sauropoda, Dinosauria ABSTRACTSkeletons of sauropods are rarely found with fore and hind feet, and until now, only one specimen of this clade has been reported with all four autopodia preserved complete and articulated. This makes interpretations on their locomotion difficult and proper assignments of footprints to genus-or even species-level taxa are generally impossible. Camarasaurus SMA 0002 from the Upper Jurassic Morrison Formation at Howe Ranch in the vicinity of Shell (Wyoming, USA) is the first sauropod with completely preserved and articulated osteological remains of all feet in addition to autopodial skin impressions. We describe in detail the morphology of the SMA 0002 autopodial bones and integumentary impressions, and draw comparisons with the published data on Camarasaurus and other sauropod manus and pedes. Our reconstruction orients the lateral side of the manus claw such that it faces the ground and possibly even contacts it distally. A 3D reconstruction of the autopodia of SMA 0002 yields new insights into the still debated relationship of footprint lengths to hip height in sauropods, and indicates that it might be variable among genera. Furthermore, manual and pedal morphology and the 3D model yield crucial information about the expected footprint shape of Camarasaurus. The recovered characteristics of the footprint do not possess a set of features to be confidently referred to a known ichnospecies.

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Sauropod Ichnology: Overview and New Research Lines from a South American Perspective

Calvo

Riga

Apesteguı́a

et al. 2022

South American Sauropodomorph Dinosaurs

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An articulated titanosaur from Patagonia (Argentina): New evidence of neosauropod pedal evolution

Cited by 42 publications

References 10 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

Articulated bone sets of manus and pedes of Camarasaurus (Sauropoda, Dinosauria)

Sauropod Ichnology: Overview and New Research Lines from a South American Perspective

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