Sigilmassasaurus is Spinosaurus: A reappraisal of African spinosaurines

@article{Smyth2020SigilmassasaurusIS,
  title={Sigilmassasaurus is Spinosaurus: A reappraisal of African spinosaurines},
  author={Robert S.H. Smyth and Nizar Ibrahim and David M. Martill},
  journal={Cretaceous Research},
  year={2020},
  volume={114},
  pages={104520}
}
Abstract Remains of enigmatic spinosaurs from mid-Cretaceous North African strata have, for over a century, been the subject of taxonomic deliberations. The gigantic Spinosaurus aegyptiacus Stromer, 1915 has gained iconic status in the vertebrate palaeontological community and amongst the general public. Perhaps the largest predatory dinosaur to have lived, this animal exhibits a bizarre range of adaptations consistent with a piscivorous diet and semiaquatic mode of life. Despite its popularity… Expand
New spinosaurids from the Wessex Formation (Early Cretaceous, UK) and the European origins of Spinosauridae
TLDR
These new finds provide welcome information on poorly sampled areas of spinosaurid anatomy, suggest that sympatry was present and potentially common in baryonychines andspinosaurids as a whole, and contribute to updated palaeobiogeographic reconstructions for the clade. Expand
An update of the spinosaurid (Dinosauria: Theropoda) fossil record from the Lower Cretaceous of the Iberian Peninsula: distribution, diversity, and evolutionary history
The fossil record of spinosaurid theropods from the Lower Cretaceous of the Iberian Peninsula is relatively abundant, but not very informative. This record, as generally occurs in other geographicExpand
Carcharodontosauridae theropod tooth crowns from the Upper Cretaceous (Bauru Basin) of Brazil: A reassessment of isolated elements and its implications to palaeobiogeography of the group
Abstract Theropod tooth crowns are abundant in the Upper Cretaceous (post-Coniacian) continental deposits of the Bauru Group, Brazil. The distribution of anatomical crown features indicates that aExpand
Evaluating the ecology of Spinosaurus: shoreline generalist or aquatic pursuit specialist?
The giant theropod Spinosaurus was an unusual animal and highly derived in many ways, and interpretations of its ecology remain controversial. Recent papers have added considerable knowledge of theExpand
Contributions to a Discussion of Spinosaurus aegyptiacus as a Capable Swimmer and Deep-Water Predator
TLDR
The muscular neck permitted ‘pivot’ feeding, where the prey’s escape abilities were overcome by rapid dorsoventral head movement, facilitated by crest-mediated lower friction. Expand
Vertebral pneumaticity of the paravian theropod Unenlagia comahuensis, from the Upper Cretaceous of Patagonia, Argentina
TLDR
Analysis of the vertebral pneumaticity of the unenlagiine theropod Unenlagia comahuensis provides valuable information that helps to clarify this trend, not only in dromaeosaurids but also throughout theropid evolution. Expand
New mid-cervical vertebral morphotype of Spinosauridae from the Kem Kem Group of Morocco
TLDR
An unusual mid-cervical vertebra belonging to a large spinosaurid from the Cenomanian Kem Kem Group of Morocco is described, and could lend support to the controversial hypothesis that two spinosurid taxa are represented in the Kem Kem group. Expand
A Reassessment of the Taxonomic Validity of Dynamoterror dynastes (Theropoda, Tyrannosauridae)
TLDR
The combination of inadequacy of autapomorphies and the highly fragmentary nature of the holotype means that the taxonomic name of Dynamoterror should be regarded as a nomen dubium. Expand
Ceratosaurus (Theropoda, Ceratosauria) teeth from the Tacuarembó Formation (Late Jurassic, Uruguay)
Abstract Isolated theropod teeth from the Tacuarembo Formation (Late Jurassic of Uruguay) are comprehensively described. Several features (mesial teeth with restricted mesial carina not twistedExpand
Population modelling insights of extinct environments: the case of the Kem Kem palaeocommunity
TLDR
This paper simulates a small community module of this environment, consisting of Carrion, Fishes, Spinosaurus, and a functional group composed of large terrestrial Theropods, and shows that these exclusive food sources could have assured the possibility of coexistence, and in their absence, one top predator could be locally extinct. Expand
...
1
2
...

References

SHOWING 1-10 OF 135 REFERENCES
Juvenile spinosaurs (Theropoda: Spinosauridae) from the middle Cretaceous of Morocco and implications for spinosaur ecology
Abstract The Spinosauridae is a specialised clade of theropod dinosaurs known from the Berriasian to the Cenomanian of Africa, South America, Europe and Asia. Spinosaurs were unusual among non-avianExpand
A new spinosaurid theropod (Dinosauria: Megalosauroidea) from the upper Barremian of Vallibona, Spain: Implications for spinosaurid diversity in the Early Cretaceous of the Iberian Peninsula
Abstract A new medium-sized theropod dinosaur from the Arcillas de Morella Formation (upper Barremian) in Vallibona (Castellon, Spain) is described based on a partial skeleton. VallibonavenatrixExpand
Morphofunctional Analysis of the Quadrate of Spinosauridae (Dinosauria: Theropoda) and the Presence of Spinosaurus and a Second Spinosaurine Taxon in the Cenomanian of North Africa.
Six quadrate bones, of which two almost certainly come from the Kem Kem beds (Cenomanian, Upper Cretaceous) of south-eastern Morocco, are determined to be from juvenile and adult individuals ofExpand
The first definitive Asian spinosaurid (Dinosauria: Theropoda) from the early cretaceous of Laos
TLDR
Cladistic analysis identifies Ichthyovenator as a member of the sub-clade Baryonychinae and suggests a widespread distribution of this clade at the end of the Early Cretaceous, the first definite record of Spinosauridae from Asia. Expand
A reappraisal of the morphology and systematic position of the theropod dinosaur Sigilmassasaurus from the “middle” Cretaceous of Morocco
TLDR
Based on the new remains, a re-evaluation of the original materials, and comparisons with other spinosaurids, the holotype of Sigilmassasaurus brevicollis is identified as an anterior dorsal, rather than a cervical vertebra, and differences between elements referred to this taxon can be explained by different positions of the elements in question within the vertebral column. Expand
Semiaquatic adaptations in a giant predatory dinosaur
TLDR
Adaptations for a semiaquatic lifestyle in the dinosaur Spinosaurus aegyptiacus are described, including retraction of the fleshy nostrils to a position near the mid-region of the skull and an elongate neck and trunk that shift the center of body mass anterior to the knee joint. Expand
A new dinosaur (Theropoda, Spinosauridae) from the Cretaceous (Cenomanian) Alcântara Formation, Cajual Island, Brazil.
TLDR
Oxalaia quilombensis appears to be more closely related to the spinosaurids found in North Africa than to the Brazilian members of this clade and thus further increases the diversity of these enigmatic predatory dinosaurs in this country. Expand
On the spinosaurid theropod teeth from the early Barremian (Early Cretaceous) Blesa Formation (Spain)
Spinosaurids are one of the most abundant theropods from the Early Cretaceous of the Iberian Peninsula. The published fossil record consists mainly of teeth. A good example is La Cantalera-1 site inExpand
Spinosaur taxonomy and evolution of craniodental features: Evidence from Brazil
TLDR
Some craniodental features of spinosaurid theropods from Brazil are reinterpreted, providing new data for taxonomic and evolutionary issues concerning this particular clade of dinosaurs, and leave open the possibility of the former subfamily being non-monophyletic. Expand
NEW INFORMATION REGARDING THE HOLOTYPE OF SPINOSAURUS AEGYPTIACUS STROMER, 1915
In the autumn of 1912, the fossil collector Richard Markgraf, with financial support and direction from Bavarian paleontologist Ernst Freiherr Stromer von Reichenbach and the Bavarian Academy ofExpand
...
1
2
3
4
5
...