Ligabuesaurus leanzai gen. et sp. nov. (Dinosauria, Sauropoda), a new titanosaur from the Lohan Cura Formation (Aptian, Lower Cretaceous) of Neuquén, Patagonia, Argentina

Bonaparte, José F.; Riga, Bernardo J. González; Apesteguı́a, Sebastián

doi:10.1016/j.cretres.2005.07.004

Cited by 113 publications

(81 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The region surrounding the hyposphene is damaged or covered in all three vertebrae (Figs. 9–10), but it was probably present, as is the case in most sauropods excluding derived titanosaurs and many rebbachisaurids [11], [33], [39], [40]. On both sides of each vertebra, a stout CPRL extends dorsally and curls medially to support the medial part of the prezygapophysis from below.…”

Section: Resultsmentioning

confidence: 99%

Osteology of Huabeisaurus allocotus (Sauropoda: Titanosauriformes) from the Upper Cretaceous of China

et al. 2013

View full text Add to dashboard Cite

BackgroundThe Late Cretaceous titanosauriform sauropod Huabeisaurus allocotus Pang and Cheng is known from teeth and much of the postcranial skeleton. Its completeness makes it an important taxon for integrating and interpreting anatomical observations from more fragmentary Cretaceous East Asian sauropods and for understanding titanosauriform evolution in general.Methodology/Principal FindingsWe present a detailed redescription of Huabeisaurus allocotus and a suite of anatomical comparisons with other titanosauriforms that demonstrate its validity via autapomorphies (e.g., division of some presacral vertebral laminae, reduced development of caudal ribs, the development of fossae relative to one another in caudal vertebral neural arches, high tibia-to-femur ratio). Huabeisaurus shares many features with other Cretaceous East Asian sauropods (e.g., pendant cervical ribs, anterior-middle caudal vertebrae with a nearly flat anterior centrum face and a concave posterior centrum face) that are absent in sauropods from other landmasses and strata, suggesting a close relationship among many of these forms within the clade Somphospondyli.Conclusions/SignificanceRestudy of Huabeisaurus provides further evidence for the existence of a clade of somphospondylans – Euhelopodidae – mainly found in the Cretaceous of East Asia. Euhelopodidae represents a fourth example of the evolution of narrow crowns within Sauropoda, along with diplodocoids, brachiosaurids, and advanced titanosaurs (lithostrotians). Despite being known from fewer species than Diplodocoidea, Brachiosauridae, or Lithostrotia, euhelopodids possessed a broader range of tooth shapes than any of these clades, suggesting that euhelopodids exemplified a comparably broad range of feeding strategies and perhaps diets.

show abstract

Section: Resultsmentioning

confidence: 99%

Osteology of Huabeisaurus allocotus (Sauropoda: Titanosauriformes) from the Upper Cretaceous of China

et al. 2013

View full text Add to dashboard Cite

show abstract

“…There is a subtriangular process on the ventral margin towards the posterior end of the acromion, but it is unclear whether there was a second ventral process on the anterior portion of the scapular blade. As such, Vouivria shares the presence of at least the anterior ventral process with a wide array of titanosauriforms, including Giraffatitan , as well as some basal eusauropods and diplodocids (Bonaparte, González Riga & Apesteguía, 2006; Carballido et al, 2011b; D’Emic, Wilson & Williamson, 2011; Mannion et al, 2013; Tschopp, Mateus & Benson, 2015). …”

Section: Description and Comparisonsmentioning

confidence: 99%

The earliest known titanosauriform sauropod dinosaur and the evolution of Brachiosauridae

Mannion

Allain

Moine

2017

PeerJ

112

View full text Add to dashboard Cite

Brachiosauridae is a clade of titanosauriform sauropod dinosaurs that includes the well-known 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 inter-relationships. 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 variation between taxa, and implementation of sensitivity analyses, in which these characters are excluded, has no effect on tree topology or resolution. We argue that where there is morphological variation, this should be captured, rather than ignored. Unambiguous brachiosaurid remains are known only from the USA, western Europe and Africa, and the clade spanned the Late Jurassic through to the late Albian/early Cenomanian, with the last known occurrences all from the USA. Regardless of whether their absence from the Cretaceous of Europe, as well as other regions entirely, reflects regional extinctions and genuine absences, or sampling artefacts, brachiosaurids appear to have become globally extinct by the earliest Late Cretaceous.

show abstract

“…), Ligabuesaurus (Bonaparte et al . ), Giraffatitan (Janensch 1936), Sauroposeidon (Rose ; D'Emic & Foreman ) and Astrophocaudia (D'Emic ); they are congruent with the stratigraphical range of this group of sauropods (D'Emic ; Mannion et al . ).…”

Section: Sauropod Tooth Morphotypesmentioning

confidence: 66%

Sauropod tooth morphotypes from the Upper Jurassic of the Lusitanian Basin (Portugal)

Mocho

Royo–Torres²,

Malafaia

et al. 2017

Papers in Palaeontology

View full text Add to dashboard Cite

The Upper Jurassic of the Lusitanian Basin has yielded an important fossil record of sauropods, but little information is available about the tooth morphotypes represented in this region. A large sample of teeth, both unpublished and published, is described and discussed here. Four main tooth morphologies are identified: spatulate, heart‐shaped, pencil‐shaped, and compressed cone‐chisel‐shaped. Heart‐shaped teeth are considered to be exclusive to a non‐neosauropod eusauropod, tentatively referred to Turiasauria. The spatulate teeth can be attributed to members of the Macronaria; they have a complex cingulum, more than one lingual facet and a labial ridge. The compressed cone‐chisel‐shaped teeth are also attributed to macronarians and the presence of an axially twisted apex through an arc of 30°–45° suggests putative affinities with Europasaurus and basal titanosauriforms. The variability observed in the overall morphology and wrinkling pattern of the compressed cone‐chisel‐shaped teeth may be due to factors related to the tooth position or to the ontogeny of individuals. Finally, pencil‐shaped teeth with high slenderness index values, oval and apically located wear facets, subcylindrical crowns and lacking carinae, are tentatively assigned to Diplodocoidea. The diversity of tooth morphologies is in accordance with the known palaeobiodiversity of the Portuguese Late Jurassic sauropod fauna, which is composed of non‐neosauropod eusauropods (turiasaurs), diplodocoids (diplodocids) and macronarians (camarasaurids and probably brachiosaurids). The Late Jurassic sauropod fossil record of the Iberian Peninsula presents the broadest tooth morphospace range in the world from this period, suggesting a wide niche partition for sauropods, and corresponding high taxonomic diversity.

show abstract

Ligabuesaurus leanzai gen. et sp. nov. (Dinosauria, Sauropoda), a new titanosaur from the Lohan Cura Formation (Aptian, Lower Cretaceous) of Neuquén, Patagonia, Argentina

Cited by 113 publications

References 20 publications

Osteology of Huabeisaurus allocotus (Sauropoda: Titanosauriformes) from the Upper Cretaceous of China

Osteology of Huabeisaurus allocotus (Sauropoda: Titanosauriformes) from the Upper Cretaceous of China

The earliest known titanosauriform sauropod dinosaur and the evolution of Brachiosauridae

Sauropod tooth morphotypes from the Upper Jurassic of the Lusitanian Basin (Portugal)

Contact Info

Product

Resources

About