Vertebrate paleobiodiversity of the Early Cretaceous (Berriasian) Angeac-Charente Lagerstätte (southwestern France): implications for continental faunal turnover at the J/K boundary

Allain, Ronan; Vullo, Romain; Rozada, Lee; Anquetin, Jérémy; Bourgeais, Renaud; Goedert, Jean; Lasseron, Maxime; Martin, Jérémy E.; Pérez‐García, Adán; Fabrègues, Claire Peyre de; Royo–Torres, Rafael; Augier, Dominique; Bailly, Gilles; Cazes, Lilian; Despres, Yohan; Gailliègue, Auréliane; Gómez, Bernard; Goussard, Florent; Lenglet, Thierry; Vacant, Renaud; Mazan, .; Tournepiche, Jean‐François

doi:10.5252/geodiversitas2022v44a25

Cited by 15 publications

(6 citation statements)

References 191 publications

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“…European earliest Cretaceous sauropod faunas appear to lack many of the forms that were present during the latest Jurassic, with no evidence for camarasaurid macronarians or flagellicaudatan diplodocoids. Berriasian deposits in the United Kingdom and Denmark have yielded sauropod teeth that are indeterminate, albeit not referable to either Diplodocoidea or Lithostrotia [293,294], whereas coeval deposits in France have produced indeterminate embryonic sauropod teeth [295] and remains of both turiasaurians and macronarians [296]. Slightly younger (upper Berriasian–lower Valanginian) deposits in the United Kingdom have yielded evidence of turiasaurians ([96]; although the exact provenance and age of this material is uncertain), the possible non-neosauropod eusauropod Haestasaurus [211,297–299], rebbachisaurids [300–302] and probable titanosauriforms [303–305].…”

Section: Discussionmentioning

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: Discussionmentioning

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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“…Numerous “ridges” ( i.e., flutes) ornament the enamel of goniopholidid and pholidosaurid crowns; in Goniopholis and Pholidosaurus for instance, these are well defined and closely packed ( Allain et al, 2022 ; De Andrade et al, 2011 ; Martin, Raslan-Loubatié & Mazin, 2016 ; Owen, 1840–1845 ; Owen, 1878 ; Owen, 1879 ), whereas those of HASMG G369a are fewer and poorly defined. Interestingly, Owen (1840–1845) drew attention to the differences present between enamel ornamentation of “ Suchosaurus cultridens ” relative to that of Goniopholis .…”

Section: Discussionmentioning

confidence: 99%

Isolated tooth reveals hidden spinosaurid dinosaur diversity in the British Wealden Supergroup (Lower Cretaceous)

Barker

Naish

Gostling

2023

PeerJ

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Isolated spinosaurid teeth are relatively well represented in the Lower Cretaceous Wealden Supergroup of southern England, UK. Until recently it was assumed that these teeth were referable to Baryonyx, the type species (B. walkeri) and specimen of which is from the Barremian Upper Weald Clay Formation of Surrey. British spinosaurid teeth are known from formations that span much of the c. 25 Ma depositional history of the Wealden Supergroup, and recent works suggest that British spinosaurids were more taxonomically diverse than previously thought. On the basis of both arguments, it is appropriate to doubt the hypothesis that isolated teeth from outside the Upper Weald Clay Formation are referable to Baryonyx. Here, we use phylogenetic, discriminant and cluster analyses to test whether an isolated spinosaurid tooth (HASMG G369a, consisting of a crown and part of the root) from a non-Weald Clay Formation unit can be referred to Baryonyx. HASMG G369a was recovered from an uncertain Lower Cretaceous locality in East Sussex but is probably from a Valanginian exposure of the Hastings Group and among the oldest spinosaurid material known from the UK. Spinosaurid affinities are both quantitatively and qualitatively supported, and HASMG G369a does not associate with Baryonyx in any analysis. This supports recent reinterpretations of the diversity of spinosaurid in the Early Cretaceous of Britain, which appears to have been populated by multiple spinosaurid lineages in a manner comparable to coeval Iberian deposits. This work also reviews the British and global records of early spinosaurids (known mainly from dental specimens), and revisits evidence for post-Cenomanian spinosaurid persistence.

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“…However, in Europe on the Iberian Peninsula, a Morrison "style" fauna dominated by diverse sauropods (diplodocids, camarasaurids and brachiosaurids), stegosaurs, and diverse large theropods (Allosaurus and Torvosaurus) continued up through the Tithonian possibly into the basal Berriasian (Foster, 2021;Allain et al, 2022). The medial YCM calcrete may reflect the first evidence of a rain shadow with the beginnings of the Sevier orogeny in western Utah following a considerably wetter interval across the Jurassic-Cretaceous (J/K) boundary (Suarez, et al, 2014) as indicated by the underlying ferruginous paleosols .…”

Section: Reassessment Of Yurgovuchia Pelvic Materials and Theropod Di...mentioning

confidence: 99%

14th Symposium on Mesozoic Terrestrial Ecosystems and Biota

2023

The Anatomical Record

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Vertebrate paleobiodiversity of the Early Cretaceous (Berriasian) Angeac-Charente Lagerstätte (southwestern France): implications for continental faunal turnover at the J/K boundary

Cited by 15 publications

References 191 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

Isolated tooth reveals hidden spinosaurid dinosaur diversity in the British Wealden Supergroup (Lower Cretaceous)

14th Symposium on Mesozoic Terrestrial Ecosystems and Biota

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