Osteology of the Late Cretaceous Argentinean sauropod dinosaur Mendozasaurus neguyelap: implications for basal titanosaur relationships

Riga, Bernardo J. González; Mannion, Philip D.; Poropat, Stephen F.; David, Leonardo Daniel Ortiz; Coria, Juan Pedro

doi:10.1093/zoolinnean/zlx103

Cited by 65 publications

(54 citation statements)

References 79 publications

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“…The anterior margin of the bone is straight, whereas the posterior one is strongly sigmoid, much more than in other titanosaurs (for instance, Uberabatitan, Mendozasaurus, Elaltitan; Salgado & Carvalho, 2008;Silva Junior et al, 2019;González Riga et al, 2018;Mannion & Otero, 2012). The fibular shaft is also strongly sigmoidal in posterior view, with the lateral surface markedly convex at level of the biceps tubercle ( Figure 23C).…”

Section: Sauropoda Marsh 1878mentioning

confidence: 89%

“…The sigmoid curve present in both Nullotitan and Dreadnoughtus is exaggerated in lateral view, for the notable anteroposterior expansion of both proximal and distal ends of the bone. In lateral view, the proximal margin of the fibula is nearly horizontally oriented, as occurs in Dreadnoughtus (Ullman & Lacovara, 2016), Mendozasaurus (González Riga et al, 2018), Saltasaurus (Powell, 2003), and Neuquensaurus (Otero, 2010), and unlike other titanosaurs such as Uberabatitan (Salgado & Carvalho, 2008;Silva Junior et al, 2019) in which it is posteriorly inclined. On the lateral surface, there is the tubercle for the M. iliofibularis.…”

Section: Sauropoda Marsh 1878mentioning

confidence: 91%

“…This means a shorter deltopectoral crest, with values more similar to those of basal titanosaurs such as Paralititan and Epachthosaurus the ratio is nearly 31% (Smith et al, 2001;Martínez et al, 2004). In other forms, in turn, the deltopectoral crest is more distally extended, such as in Elaltitan (36%; Mannion & Otero, 2012), Dreadnoughtus (37%), Patagotitan (33.6%; Carballido et al, 2017), Narambuenatitan and Mendozasaurus (35%; Filippi et al, 2011;González Riga et al, 2018). Femur (Figure 21).…”

Section: Sauropoda Marsh 1878mentioning

confidence: 95%

“…As follows, we compare Nullotitan with other gigantic members of the colossosaurian clade Lognkosauria (sensu Carballido et al, 2017;González Riga et al, 2019). This clade is actually composed by the genera Argentinosaurus, Futalognkosaurus, Mendozasaurus, Notocolossus, Patagotitan, Puertasaurus, Dreadnoughtus and Drusilasaura (Carballido et al, 2017;González Riga et al, 2018. Patagotitan, Futalognkosaurus, and Notocolossus show the first caudal transverse processes with a notably dorsoventrally narrow base, a condition not observed in Nullotitan (Carballido et al, 2017).…”

Section: Riga Et Al 2019)mentioning

confidence: 99%

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Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Novas¹,

Agnolín²,

Rozadilla³

et al. 2019

MACN

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The first fossil remains of vertebrates, invertebrates, plants and palynomorphs of the Chorrillo Formation (Austral Basin), about 30km to the SW of the town of El Calafate (Province of Santa Cruz), are described. Fossils include the elasmarian (basal Iguanodontia) Isasicursor santacrucensis gen. et sp. nov., the large titanosaur Nullotitan glaciaris gen. et sp. nov., both large and small Megaraptoridae indet., and fragments of sauropod and theropod eggshells. The list of vertebrates is also composed by the Neognathae Kookne yeutensis gen. et sp. nov., two isolated caudal vertebrae of Mammalia indet., and isolated teeth of a large mosasaur. Remains of fishes, anurans, turtles, and snakes are represented by fragmentary material of low taxonomical value, with the exception of remains belonging to Calyptocephalellidae. On the other hand, a remarkable diversity of terrestrial and freshwater gastropods has been documented, as well as fossil woods and palinological assemblages. The Chorrillo Formation continues south, in the Las Chinas River valley, southern Chile, where it is called Dorotea Formation. Both units share in their lower two thirds abundant materials of titanosaurs, whose remains cease to appear in the upper third, registering only elasmarians (Chorrillo Formation) and hadrosaurs (Dorotea Formation). Above both units there are levels with remains of invertebrates and marine reptiles. It is striking that the dinosaurs of the lower two thirds of the Chorrillo and Dorotea formations are represented by large basal titanosaurs and Megaraptoridae coelurosaurs, being the Saltasaurinae and Aeolosaurinae sauropods and Abelisauridae theropods totally absent. In contrast, these taxa are dominant components in sedimentary units of central and northern Patagonia (e.g., Allen, Los Alamitos, La Colonia formations). Such differences could reflect, in part, a greater antiquity (i.e., late Campanian-early Maastrichtian) for the Chorrillo fossils, or, more probably, different environmental conditions. Thus, knowledge of the biota of the southern tip of Patagonia is expanded, particularly those temporarily close to the K-Pg boundary.

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Section: Sauropoda Marsh 1878mentioning

confidence: 89%

Section: Sauropoda Marsh 1878mentioning

confidence: 91%

Section: Sauropoda Marsh 1878mentioning

confidence: 95%

Section: Riga Et Al 2019)mentioning

confidence: 99%

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Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Novas¹,

Agnolín²,

Rozadilla³

et al. 2019

MACN

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“…1). The marine Lower Cretaceous section, containing a rich invertebrate fauna, has been described repeatedly in the literature (Pavlow and Lamplugh, 1892;Pavlow, 1901;Chernova, 1951;Sazonova, 1958;Glazunova, 1967Glazunova, , 1973Myatlyuk, 1984;Baraboshkin et al, 2001;Guzhikov, Baraboshkin, and Birbina, 2003;Blagovetshenskiy and Shumilkin, 2006a, b;Baraboshkin and Blagovetshenskiy, 2010). The section at Slantsevy Rudnik represents the upper part of the Hauterivian with a total thickness of 38.8 m (Baraboshkin and Blagovetshenskiy, 2010).…”

Section: Geological Contextmentioning

confidence: 94%

The oldest titanosaurian sauropod of the Northern Hemisphere

Alexander

Vladimir

2018

BioComm

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Volgatitan simbirskiensis, gen. et sp. nov., is described based on a series of anterior and middle caudal vertebrae from a single individual discovered in the Lower Cretaceous (upper Hauterivian, Speetoniceras versicolor ammonite Zone) marine deposits at Slantsevy Rudnik vertebrate locality near Ulyanovsk City, Russia. The new taxon is characterized by strongly procoelous anterior and middle caudal vertebrae, a long centrum of the first caudal vertebra, a strong ventral ridge in the anterior and middle caudal vertebrae, a neural arch positioned at the anterior half of the centrum, hyposphene-hypantrum articulation in the anterior caudal vertebrae, and somphospondylous bone texture. Phylogenetic analysis places the new taxon as a lithostrotian titanosaur, a basal member of the lineage leading to the Lognkosauria. This lineage previously contained only South American taxa with body mass reaching 60-70 tons. Volgatitan gen. nov. is the first European and the geologically oldest representative of this lineage. Its body mass is estimated as 17.3 tons. Discovery of Volgatitan gen. nov. suggests that the lithostrotian lineage leading to the Lognkosauria had a wider distribution in the Early Cretaceous and became extinct everywhere except South America by the end of the Early Cretaceous. Citation: Citation: Averianov, A. and Efimov, V. 2018. The oldest titanosaurian sauropod of the Northern Hemisphere. Bio. Comm. 63(3): 145-162. https://doi.

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Last Titans: Titanosaurs From the Campanian–Maastrichtian Age

Santucci

Filippi²

2022

South American Sauropodomorph Dinosaurs

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Osteology of the Late Cretaceous Argentinean sauropod dinosaur Mendozasaurus neguyelap: implications for basal titanosaur relationships

Cited by 65 publications

References 79 publications

Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

The oldest titanosaurian sauropod of the Northern Hemisphere

Last Titans: Titanosaurs From the Campanian–Maastrichtian Age

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