CRANIOFACIAL ANATOMY OF MAJUNGASAURUS CRENATISSIMUS (THEROPODA: ABELISAURIDAE) FROM THE LATE CRETACEOUS OF MADAGASCAR

@inproceedings{Sampson2007CRANIOFACIALAO,
  title={CRANIOFACIAL ANATOMY OF MAJUNGASAURUS CRENATISSIMUS (THEROPODA: ABELISAURIDAE) FROM THE LATE CRETACEOUS OF MADAGASCAR},
  author={Scott D. Sampson and Lawrence M. Witmer},
  year={2007}
}
Abstract Recent fieldwork in the Upper Cretaceous (Maastrichtian) Maevarano Formation, northwest Madagascar, has yielded important new skull material of the abelisaurid theropod, Majungasaurus crenatissimus. One of these specimens in particular—a virtually complete, disarticulated, and well preserved skull—greatly elucidates the craniofacial osteology of abelisaurids. Herein we describe the skull and lower jaws of this mid-sized theropod dinosaur. A number of features of the facial skeleton and… Expand
THE POSTCRANIAL AXIAL SKELETON OF MAJUNGASAURUS CRENATISSIMUS (THEROPODA: ABELISAURIDAE) FROM THE LATE CRETACEOUS OF MADAGASCAR
ABSTRACT Recent fieldwork in Upper Cretaceous terrestrial deposits in northwestern Madagascar has yielded a remarkable diversity of vertebrates, including several specimens of the abelisauridExpand
Ontogenetic Changes in the Craniomandibular Skeleton of the Abelisaurid Dinosaur Majungasaurus crenatissimus from the Late Cretaceous of Madagascar
TLDR
Growth trajectories in the shape of individual cranial bones and articulated skulls of Majungasaurus using geometric morphometrics provide a post-hatching developmental framework for understanding the evolution of the distinctive tall skull morphology seen in abelisaurids and other large-sized theropod dinosaurs. Expand
PATHOLOGY IN MAJUNGASAURUS CRENATISSIMUS (THEROPODA: ABELISAURIDAE) FROM THE LATE CRETACEOUS OF MADAGASCAR
TLDR
This work states that Majungasaurus is the first abelisauroid theropod for which comprehensive pathology data are available and abnormalities were identified in eight elements from a minimum of four individuals, including a caudal truncation in a predatory dinosaur. Expand
THE APPENDICULAR SKELETON OF MAJUNGASAURUS CRENATISSIMUS (THEROPODA: ABELISAURIDAE) FROM THE LATE CRETACEOUS OF MADAGASCAR
TLDR
These materials illustrate that the appendicular skeleton of abelisaurids was specialized over the typical condition in basal theropods, particularly through the development of enlarged muscle attachment processes. Expand
The Braincase Anatomy of the Late Cretaceous Dinosaur Alioramus (Theropoda: Tyrannosauroidea)
ABSTRACT The late Cretaceous tyrannosaurid Alioramus altai is known from a single specimen whose articulated braincase exhibits a nearly unique combination of preservational quality, subadult stageExpand
A thick-skulled theropod (Dinosauria, Saurischia) from the Upper Cretaceous of Morocco with implications for carcharodontosaurid cranial evolution
Abstract In this study, we erect Sauroniops pachytholus gen. et sp. nov., a large-bodied theropod dinosaur from the Cenomanian (Upper Cretaceous) of Morocco, on the basis of an almost completeExpand
Craniofacial Morphology of Simosuchus clarki (Crocodyliformes: Notosuchia) from the Late Cretaceous of Madagascar
TLDR
Assessment of both external and internal morphological features indicates a habitual head posture in which the preorbital portion of the dermal skull roof was tilted downward at an angle of ∼45°, which strongly indicates a predominantly if not exclusively herbivorous diet. Expand
Paleopathology in a nearly complete skeleton of Majungasaurus crenatissimus (Theropoda: Abelisauridae)
TLDR
A survey of Majungasaurus indicates most well preserved individuals lack observable pathology, whereas select individuals possess multiple pathologies, a general pattern also noted in other large, nonavian theropods. Expand
Osteoderms of Simosuchus clarki (Crocodyliformes: Notosuchia) from the Late Cretaceous of Madagascar
TLDR
The anatomy, arrangement, and histology of the osteoderms of S. clarki are described, and comments on the phylogenetic and functional importance of these structures are provided, and several new morphological characters are described. Expand
The Braincase Anatomy of the Late Cretaceous Dinosaur Alioramus (Theropoda: Tyrannosauroidea)
ABSTRACT The late Cretaceous tyrannosaurid Alioramus altai is known from a single specimen whose articulated braincase exhibits a nearly unique combination of preservational quality, subadult stageExpand
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THE POSTCRANIAL AXIAL SKELETON OF MAJUNGASAURUS CRENATISSIMUS (THEROPODA: ABELISAURIDAE) FROM THE LATE CRETACEOUS OF MADAGASCAR
ABSTRACT Recent fieldwork in Upper Cretaceous terrestrial deposits in northwestern Madagascar has yielded a remarkable diversity of vertebrates, including several specimens of the abelisauridExpand
THE OSTEOLOGY OF MASIAKASAURUS KNOPFLERI, A SMALL ABELISAUROID (DINOSAURIA: THEROPODA) FROM THE LATE CRETACEOUS OF MADAGASCAR
Abstract We describe the osteology of the new small theropod dinosaur Masiakasaurus knopfleri, from the Late Cretaceous Maevarano Formation of northwestern Madagascar. Approximately 40% of theExpand
THE APPENDICULAR SKELETON OF MAJUNGASAURUS CRENATISSIMUS (THEROPODA: ABELISAURIDAE) FROM THE LATE CRETACEOUS OF MADAGASCAR
TLDR
These materials illustrate that the appendicular skeleton of abelisaurids was specialized over the typical condition in basal theropods, particularly through the development of enlarged muscle attachment processes. Expand
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