First complete sauropod dinosaur skull from the Cretaceous of the Americas and the evolution of sauropod dentition

  title={First complete sauropod dinosaur skull from the Cretaceous of the Americas and the evolution of sauropod dentition},
  author={Daniel J. Chure and Brooks B. Britt and John A. Whitlock and JEFFREY A. Wilson},
  journal={Die Naturwissenschaften},
  pages={379 - 391}
Sauropod dinosaur bones are common in Mesozoic terrestrial sediments, but sauropod skulls are exceedingly rare—cranial materials are known for less than one third of sauropod genera and even fewer are known from complete skulls. Here we describe the first complete sauropod skull from the Cretaceous of the Americas, Abydosaurus mcintoshi, n. gen., n. sp., known from 104.46 ± 0.95 Ma (megannum) sediments from Dinosaur National Monument, USA. Abydosaurus shares close ancestry with Brachiosaurus… 

A possible brachiosaurid (Dinosauria, Sauropoda) from the mid-Cretaceous of northeastern China

An isolated sauropod maxilla from the middle Cretaceous Longjing Formation of the Yanji basin of northeast China is reported, providing the most convincing evidence to date that brachiosaurids dispersed into Asia at some point in their evolutionary history.

The earliest known titanosauriform sauropod dinosaur and the evolution of Brachiosauridae

Vouivria is a basal brachiosaurid, confirming its status as the stratigraphically oldest known titanosauriform, and implementation of sensitivity analyses, in which these characters are excluded, has no effect on tree topology or resolution.

An Early Jurassic sauropod tooth from Patagonia (Cañadón Asfalto Formation): implications for sauropod diversity

A new tooth morphotype is described that can be well differentiated from any other tooth recovered from the Canadon Asfalto Formation, increasing the evidence of a high diversity of sauropods during that time as well as providing evidence of advanced characters in the dentition of some Early Jurassic sauroPods.

Revision of the sauropod dinosaurs of the Lower Cretaceous Trinity Group, southern USA, with the description of a new genus

Cladistic analysis indicates that Astrophocaudia and Sauroposeidon are members of Somphospondyli, whereas Cedarosaurus is a brachiosaurid.

Cranial anatomy of the Late Jurassic dwarf sauropod Europasaurus holgeri (Dinosauria, Camarasauromorpha): ontogenetic changes and size dimorphism

All the autapomorphic characters of Europasaurus recognized in the skull are considered to have evolved through paedomorphosis, which resulted in the dwarf condition of this taxon.

The skull of the titanosaur Tapuiasaurus macedoi (Dinosauria: Sauropoda), a basal titanosaur from the Lower Cretaceous of Brazil

The effects of missing data and missing stratigraphic ranges on results are explored, concluding that (1) when missing data levels are high, resolution of even small amounts of that missing data can have dramatic effects on topology, (2) taxa that are mostly scored for characters that cannot be scored in other taxa may be topologically unstable and (3) there were several suboptimal trees that had greatly improved stratig graphic fit with relatively little compromise in terms of tree length.

Postcranial axial skeleton of Europasaurus holgeri (Dinosauria, Sauropoda) from the Upper Jurassic of Germany: implications for sauropod ontogeny and phylogenetic relationships of basal Macronaria

The postcranial axial skeleton of sauropods is extremely modified with respect to the anatomy observed in its ancestors, the ‘prosauropods’, proving to be one of the most informative regions of the body.

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

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

A Sauropod Tooth from the Santonian of Hungary and the European Late Cretaceous ‘Sauropod Hiatus’

A single tooth from the Santonian continental beds of Iharkút, Hungary is described that represents the first European body fossil evidence of a sauropod from this critical time interval and points to a basal titanosauriform affinity suggesting the occurrence of a clade of sauropods in the Upper Cretaceous of Europe that is quite different from the previously known Campano-Maastrichtian titanosaurs.

A Basal Lithostrotian Titanosaur (Dinosauria: Sauropoda) with a Complete Skull: Implications for the Evolution and Paleobiology of Titanosauria

A number of distinctive morphologies—such as the ossified cervical tendon, extremely pneumatized cervical vertebrae, and a habitually downward-facing snout—that have rarely, if ever, been documented in other titanosaurs are documented, thus broadening the understanding of the anatomical diversity of this remarkable sauropod clade.




  • P. Rose
  • Geography, Environmental Science
  • 2007
The Texas sauropod does not possess synapomorphies of Somphospondyli, and derived characters that have been used to define the Titanosauria are also absent, affirming its placement as a basal titanosauriform.


At least two titanosaurian sauropod taxa have been discovered in the Early Cretaceous Dinosaur Beds of northern Malawi, Africa. One of these, Malawisaurus dixeyi, is represented by cranial elements,

A Basal Sauropodomorph (Dinosauria: Saurischia) from the Ischigualasto Formation (Triassic, Carnian) and the Early Evolution of Sauropodomorpha

The presence of Panphagia at the base of the early Carnian Ischigualasto Formation suggests an earlier origin of Sauropodomorpha during the Middle Triassic, and is regarded as the most basal sauropodomorph.

Redescription of the mongolian sauropod nemegtosaurus mongoliensis nowinski (dinosauria: Saurischia) and comments on late cretaceous sauropod diversity

Synopsis The isolated skulls of Nemegtosaurus mongoliensis and Quaesitosaurus orientalis from the Nemegt Basin of Mongolia are among the most complete sauropod cranial remains known from the Late

A New Basal Sauropod Dinosaur from the Middle Jurassic of Niger and the Early Evolution of Sauropoda

The anatomy of Spinophorosaurus indicates that key innovations in Jurassic sauropod evolution might have taken place in North Africa, an area close to the equator with summer-wet climate at that time and Jurassic climatic zones and phytogeography possibly controlled early saurood diversification.

Structural Extremes in a Cretaceous Dinosaur

Skeletal and dental evidence suggests that Nigersaurus was a ground-level herbivore that gathered and sliced relatively soft vegetation, the culmination of a low-browsing feeding strategy first established among diplodocoids during the Jurassic.

The evolution of sauropod feeding mechanisms

Sauropods were gigantic, long-necked, herbivorous dinosaurs, which dominated many Jurassic and Cretaceous terrestrial faunas, and the ‘aquatic’ hypothesis had an important effect on interpretations of sauropod feeding habits and mechanisms.

The last of the dinosaur titans: a new sauropod from Madagascar

A total-evidence phylogenetic analysis supports a close relationship between brachiosaurids and titanosaurs (Titanosauriformes), and the inclusion of cranial data from Rapetosaurus lays to rest questions concerning the phylogeny of the enigmatic Mongolian genera Nemegtosaurus and Quaesitosaurus.

Thunder-lizards : the Sauropodomorph dinosaurs

The present work focuses on postcranial Anatomy of Referred Specimens of the Sauropodomorph Dinosaur Melanorosaurus from the Upper Triassic of South Africa, which has implications for Functional Morphology, Evolution, and Phylogeny.

Redescription and reassessment of the phylogenetic affinities of euhelopus zdanskyi (Dinosauria: Sauropoda) from the early cretaceous of China

The results suggest that there were at least two clades of very long‐necked sauropods in East Asia, occurring in the Middle Jurassic (i.e. Omeisaurus + Mamenchisaurus) and Early Cretaceous (e.g. Euhelopus, Erketu), with the latter group perhaps also occurring in Europe (Canudo et al. 2002).