The path of giants: a new occurrence of Rebbachisauridae (Dinosauria, Diplodocoidea) in the Açu formation, NE Brazil, and its paleobiogeographic implications

Pereira, Paulo Victor Luiz Gomes da Costa; Veiga, Ingrid Martins Machado Garcia; Ribeiro, Theo Baptista; Cardozo, Ryan Henrique Bezerra; Candeiro, Carlos Roberto dos Anjos; Bergqvist, Lílian Paglarelli

doi:10.1016/j.jsames.2020.102515

Cited by 11 publications

(2 citation statements)

References 41 publications

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“…Lower Albian deposits in Neuquén Province have yielded rebbachisaurids and non-titanosaurian somphospondylans including Ligabuesaurus [75,77,88,[172][173][174], whereas upper Albian deposits in Chubut Province have produced the lognkosaurian titanosaur Patagotitan [175,176], but no rebbachisaurids. Rebbachisaurids are represented in the Albian-Cenomanian of Brazil [177], and dominate Cenomanian-Turonian sauropod faunas across Argentina [178][179][180][181][182][183][184][185][186][187][188]. The latter deposits also preserve a variety of titanosaurs, including early branching forms, such as Andesaurus, Epachthosaurus and Sarmientosaurus, as well as lognkosaurians including Argentinosaurus [58,74,84,85,[189][190][191][192][193][194][195][196][197][198].…”

Section: The Berriasian-turonian Sauropod Body Fossil Recordmentioning

confidence: 99%

Sauropod dinosaur teeth from the lower Upper Cretaceous Winton Formation of Queensland, Australia and the global record of early titanosauriforms

et al. 2022

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The Upper Cretaceous Winton Formation of Queensland, Australia, has produced several partial sauropod skeletons, but cranial remains—including teeth—remain rare. Herein, we present the first description of sauropod teeth from this formation, based on specimens from three separate sites. An isolated tooth and a dentary fragment from the Diamantinasaurus matildae type locality are considered to be referable to that titanosaurian taxon. A single tooth from the D. matildae referred specimen site is similarly regarded as being part of that individual. Seventeen teeth from a new site that are morphologically uniform, and similar to the teeth from the two Diamantinasaurus sites, are assigned to Diamantinasauria. All sauropod teeth recovered from the Winton Formation to date are compressed-cone-chisel-shaped, have low slenderness index values (2.00–2.88), are lingually curved at their apices, mesiodistally convex on their lingual surfaces, and lack prominent carinae and denticles. They are markedly different from the chisel-like teeth of derived titanosaurs, more closely resembling the teeth of early branching members of the titanosauriform radiation. This provides further support for a ‘basal’ titanosaurian position for Diamantinasauria. Scanning electron microscope microwear analysis of the wear facets of several teeth reveals more scratches than pits, implying that diamantinasaurians were mid-height (1–10 m) feeders. With a view to assessing the spatio-temporal distribution of sauropod tooth morphotypes before and after deposition of the Winton Formation, we provide a comprehensive continent-by-continent review of the early titanosauriform global record (Early to early Late Cretaceous). This indicates that throughout the Early–early Late Cretaceous, sauropod faunas transitioned from being quite diverse at higher phylogenetic levels and encompassing a range of tooth morphologies at the start of the Berriasian, to faunas comprising solely titanosaurs with limited dental variability by the end-Turonian. Furthermore, this review highlights the different ways in which this transition unfolded on each continent, including the earliest records of titanosaurs with narrow-crowned teeth on each continent.

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Section: The Berriasian-turonian Sauropod Body Fossil Recordmentioning

confidence: 99%

Sauropod dinosaur teeth from the lower Upper Cretaceous Winton Formation of Queensland, Australia and the global record of early titanosauriforms

et al. 2022

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“…However, they had not been recorded in the adjac ent State of Rio Grande d o Norte, in the Cretaceous rocks of the Potiguar Basin, up to now. A lot of dinosaur bones and fi sh scales were found at the western end of that basin, in Ceará State (Santos et al 2005, Veiga et al 2019, Pereira et al 2020a, but no tracks till now (Figure 1b).…”

Section: Introductionmentioning

confidence: 97%

First dinosaur tracks from the Açu Formation, Potiguar Basin (mid-Cretaceous of Brazil)

Leonardi¹,

Santos

Barbosa

2021

An. Acad. Bras. Ciênc.

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We record a new ichnosite bearing dinosaur tracks from the mid-Cretaceous (Aptian? -Cenomanian) of Brazil. The Fazenda dos Pingos ichnosite is situated within a sandstone pavement of the Açu Formation (Açu 3 unit) from the Potiguar Basin in the State of Rio Grande do Norte. This is a small ichnofauna, with only a few individual isolated tracks. One specimen is unequivocally attributed to a large sauropod and another to an ornithopod. Two other specimens represent poorly preserved tracks assigned to sauropods. This is the fi rst record of dinosaur tracks from the Potiguar Basin and from the Rio Grande do Norte State.

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Tracking Dinosaurs During the Equatorial and South Atlantic Opening

Leonardi,

de Fátima C. F. dos Santos,

de Souza Barbosa

2024

Dinosaur Tracks of Mesozoic Basins in Brazil

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The path of giants: a new occurrence of Rebbachisauridae (Dinosauria, Diplodocoidea) in the Açu formation, NE Brazil, and its paleobiogeographic implications

Cited by 11 publications

References 41 publications

Sauropod dinosaur teeth from the lower Upper Cretaceous Winton Formation of Queensland, Australia and the global record of early titanosauriforms

Sauropod dinosaur teeth from the lower Upper Cretaceous Winton Formation of Queensland, Australia and the global record of early titanosauriforms

First dinosaur tracks from the Açu Formation, Potiguar Basin (mid-Cretaceous of Brazil)

Tracking Dinosaurs During the Equatorial and South Atlantic Opening

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