A New Titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous (Cerro Lisandro Formation) of Mendoza Province, Argentina

Riga, Bernardo J. González; David, Leonardo Daniel Ortiz

doi:10.5710/amegh.26.12.1013.1889

Cited by 40 publications

(6 citation statements)

References 35 publications

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“…7D. These two laminae are present in the dicraeosaurid Brachytrachelopan and in titanosaurians (González Riga, 2003; Martínez et al, 2004; Rauhut et al, 2005; Salgado & Coria, 2009; Salgado & Powell, 2010). The right aspdl and pspdl laminae are in contact with one another by means of an accessory lamina that divides the fossa situated between the two spinodiapophyseal laminae (spdl), (Figs.…”

Section: Systematic Paleontologymentioning

confidence: 99%

“…More derived titanosauriforms, i.e., lithostrotian titanosaurs, are characterized by apomorphies that have made it possible to identify them relatively easily (Salgado, Coria & Calvo, 1997; Wilson, 2002; González Riga, 2003). However, non-titanosaurian titanosauriforms have been the subject of different interpretations in different cases (Wilson & Upchurch, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…However, non-titanosaurian titanosauriforms have been the subject of different interpretations in different cases (Wilson & Upchurch, 2009). This disagreement is due to the scarcity of complete specimens, which has made it difficult to establish synapomorphies that might allow us to distinguish different groups other than the titanosaurs; another difficulty in this sense is the existence of clade definitions that offer different diagnostic characteristics (Salgado, Coria & Calvo, 1997; Wilson, 2002; González Riga, 2003). Titanosauriforms are important to Cretaceous paleobiogeography because of their diversity and ubiquity, but their impact on paleobiogeography has not been fully realized owing to confusion over their phylogenetic relationships (D’Emic, 2012; Mannion et al, 2013; Gorscak & O’Connor, 2016; Poropat et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Europatitan eastwoodi, a new sauropod from the lower Cretaceous of Iberia in the initial radiation of somphospondylans in Laurasia

Fernández-Baldor¹,

Huerta

Moreno‐Azanza

et al. 2017

PeerJ

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The sauropod of El Oterillo II is a specimen that was excavated from the Castrillo de la Reina Formation (Burgos, Spain), late Barremian–early Aptian, in the 2000s but initially remained undescribed. A tooth and elements of the axial skeleton, and the scapular and pelvic girdle, represent it. It is one of the most complete titanosauriform sauropods from the Early Cretaceous of Europe and presents an opportunity to deepen our understanding of the radiation of this clade in the Early Cretaceous and study the paleobiogeographical relationships of Iberia with Gondwana and with other parts of Laurasia. The late Barremian–early Aptian is the time interval in the Cretaceous with the greatest diversity of sauropod taxa described in Iberia: two titanosauriforms, Tastavinsaurus and Europatitan; and a rebbachisaurid, Demandasaurus. The new sauropod Europatitan eastwoodi n. gen. n. sp. presents a series of autapomorphic characters in the presacral vertebrae and scapula that distinguish it from the other sauropods of the Early Cretaceous of Iberia. Our phylogenetic study locates Europatitan as the basalmost member of the Somphospondyli, clearly differentiated from other clades such as Brachiosauridae and Titanosauria, and distantly related to the contemporaneous Tastavinsaurus. Europatitan could be a representative of a Eurogondwanan fauna like Demandasaurus, the other sauropod described from the Castrillo de la Reina Formation. The presence of a sauropod fauna with marked Gondwananan affinities in the Aptian of Iberia reinforces the idea of faunal exchanges between this continental masses during the Early Cretaceous. Further specimens and more detailed analysis are needed to elucidate if this Aptian fauna is caused by the presence of previously unnoticed Aptian land bridges, or it represents a relict fauna from an earlier dispersal event.

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Section: Systematic Paleontologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Europatitan eastwoodi, a new sauropod from the lower Cretaceous of Iberia in the initial radiation of somphospondylans in Laurasia

Fernández-Baldor¹,

Huerta

Moreno‐Azanza

et al. 2017

PeerJ

View full text Add to dashboard Cite

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“…loricatus, Epachthosaurus sciuttoi, Neuquensaurus australis and M. neguyelap compared with the same feature in Panamericansaurus schroederi, Tornieria africana and Kotasaurus yamanpalliensis (see Fig. 16 in (González Riga & David, 2014)).…”

Section: Diagnosismentioning

confidence: 74%

A new giant sauropod,Australotitan cooperensisgen. et sp. nov., from the mid-Cretaceous of Australia

Hocknull

Wilkinson

Lawrence

et al. 2021

PeerJ

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A new giant sauropod, Australotitan cooperensis gen. et sp. nov., represents the first record of dinosaurs from the southern-central Winton Formation of the Eromanga Basin, Australia. We estimate the type locality to be 270–300 m from the base of the Winton Formation and compare this to the semi-contemporaneous sauropod taxa, Diamantinasaurus matildae Hocknull et al., 2009, Wintonotitan wattsi Hocknull et al., 2009 and Savannasaurus elliottorum Poropat et al., 2016. The new titanosaurian is the largest dinosaur from Australia as represented by osteological remains and based on limb-size comparisons it reached a size similar to that of the giant titanosaurians from South America. Using 3-D surface scan models we compare features of the appendicular skeleton that differentiate Australotitan cooperensis gen. et sp. nov. as a new taxon. A key limitation to the study of sauropods is the inability to easily and directly compare specimens. Therefore, 3-D cybertypes have become a more standard way to undertake direct comparative assessments. Uncoloured, low resolution, and uncharacterized 3-D surface models can lead to misinterpretations, in particular identification of pre-, syn- and post-depositional distortion. We propose a method for identifying, documenting and illustrating these distortions directly onto the 3-D geometric surface of the models using a colour reference scheme. This new method is repeatable for researchers when observing and documenting specimens including taphonomic alterations and geometric differences. A detailed comparative and preliminary computational phylogenetic assessment supports a shared ancestry for all four Winton Formation taxa, albeit with limited statistical support. Palaeobiogeographical interpretations from these resultant phylogenetic hypotheses remain equivocal due to contrary Asian and South American relationships with the Australian taxa. Temporal and palaeoenvironmental differences between the northern and southern-central sauropod locations are considered to explain the taxonomic and morphological diversity of sauropods from the Winton Formation. Interpretations for this diversity are explored, including an eco-morphocline and/or chronocline across newly developed terrestrial environments as the basin fills.

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“…The medial surface is flat and the lateral surface is anteroposteriorly convex for most of the fibula length. There is no anteromedial crest at the proximal end, contrasting with most somphospondylans (Wilson & Upchurch, 2009;D'Emic, 2012;Mannion et al, 2013), nor is there an anterolateral trochanter, such as that observed in several titanosaurs (González Riga, 2003;Wilson, Barrett & Carrano, 2011). As in other neosauropods (Wilson & Sereno, 1998), the medial surface of the proximal end forms a raised, striated region.…”

Section: Tibiamentioning

confidence: 95%

Peer Review #1 of "The earliest known titanosauriform sauropod dinosaur and the evolution of Brachiosauridae (v0.1)"

Wedel¹

2017

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Brachiosauridae is a clade of titanosauriform sauropod dinosaurs that includes the wellknown Late Jurassic taxa Brachiosaurus and Giraffatitan. However, there is disagreement over the brachiosaurid affinities of most other taxa, and little consensus regarding the clade's composition or interrelationships. An unnamed partial sauropod skeleton was collected from middle-late Oxfordian (early Late Jurassic) deposits in Damparis, in the Jura department of eastern France, in 1934. Since its brief description in 1943, this specimen has been informally known in the literature as the 'Damparis sauropod' and 'French Bothriospondylus', and has been considered a brachiosaurid by most authors. If correctly identified, this would make the specimen the earliest known titanosauriform. Coupled with its relatively complete nature and the rarity of Oxfordian sauropod remains in general, this is an important specimen for understanding the early evolution of Titanosauriformes. Full preparation and description of this specimen, known from teeth, vertebrae and most of the appendicular skeleton of a single individual, recognises it as a distinct taxon: Vouivria damparisensis gen. et sp. nov. Phylogenetic analysis of a data matrix comprising 77 taxa (including all putative brachiosaurids) scored for 416 characters recovers a fairly well resolved Brachiosauridae. Vouivria is a basal brachiosaurid, confirming its status as the stratigraphically oldest known titanosauriform. Brachiosauridae consists of a paraphyletic array of Late Jurassic forms, with Europasaurus, Vouivria and Brachiosaurus recovered as successively more nested genera that lie outside of a clade comprising (Giraffatitan + Sonorasaurus) + (Lusotitan + (Cedarosaurus + Venenosaurus)). Abydosaurus forms an unresolved polytomy with the latter five taxa. The Early Cretaceous South American sauropod Padillasaurus was previously regarded as a brachiosaurid, but is here placed within Somphospondyli. A recent study contended that a number of characters used in a previous iteration of this data matrix are 'biologically related', and thus should be excluded from phylogenetic analysis. We demonstrate that almost all of these characters show

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A New Titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous (Cerro Lisandro Formation) of Mendoza Province, Argentina

Cited by 40 publications

References 35 publications

Europatitan eastwoodi, a new sauropod from the lower Cretaceous of Iberia in the initial radiation of somphospondylans in Laurasia

Europatitan eastwoodi, a new sauropod from the lower Cretaceous of Iberia in the initial radiation of somphospondylans in Laurasia

A new giant sauropod,Australotitan cooperensisgen. et sp. nov., from the mid-Cretaceous of Australia

Peer Review #1 of "The earliest known titanosauriform sauropod dinosaur and the evolution of Brachiosauridae (v0.1)"

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