HOMOLOGY OF THE NEOCERATOPSIAN CERVICAL BAR ELEMENTS

@inproceedings{Tsuihiji2007HOMOLOGYOT,
  title={HOMOLOGY OF THE NEOCERATOPSIAN CERVICAL BAR ELEMENTS},
  author={Takanobu Tsuihiji and Peter J Makovicky},
  booktitle={Journal of Paleontology},
  year={2007}
}
In neoceratopsian dinosaurs, the centra, neural arches, and neural spines of several anteriormost cervical vertebrae are fused together to form a structure called the cervical bar (Langston, 1975) or syncervical (Ostrom and Wellnhofer, 1986). This structure characterizes all neoceratopsians (Dodson and Currie, 1990; Dodson et al., 2004; You and Dodson, 2004) for which the anterior cervicals are known, but it remains controversial how many vertebrae are fused together to produce this structure… 
View on BioOne
bioone.org
12 Citations
Highly Influential Citations
3
Background Citations
8

12 Citations

Citation Type

Citation Type

The anatomy of the syncervical of Auroraceratops (Ornithischia: Ceratopsia), the oldest known ceratopsian syncervical
TLDR
The relatively early temporal and phylogenetic appearance of a syncervical supports recent work that shows that thesyncervical of ceratopsians is unrelated to the larger head size and cranial ornamentation characteristic of later appearing ceratopopsian clades.
Head size, weaponry, and cervical adaptation: Testing craniocervical evolutionary hypotheses in Ceratopsia
TLDR
Results indicate that neither the evolution of cranial weaponry nor large head size correlates with the origin of cervical fusion in ceratopsians, and both adaptive and functional hypotheses for theorigin of the syncervical are rejected.
The postcranial skeleton of Vagaceratops irvinensis (Dinosauria, Ceratopsidae)
TLDR
This study and other recent studies of ceratopsid postcrania suggest that potentially useful taxonomic variation is present in the number of dorsosacrals, size of the groove on the ventral surface of the sacrum, morphology of the last dorsal and dorsosACral ribs, and position of the fourth trochanter of the femur.
Morphology of the Craniovertebral Joint in Psittacosaurus sibiricus (Ornithischia: Ceratopsia)
The joint of the occipital skull region and two first cervical vertebrae of Psittacosaurus sibiricus from the Shestakovo locality (Barremian–Aptian), Kemerovo Region, Russia is described. The…
Evolution and function of anterior cervical vertebral fusion in tetrapods
TLDR
Overall, the origin and function of fused cervical vertebrae is poorly understood, emphasizing the need for future comparative biomechanical studies interpreted in an evolutionary context.
Axial Skeleton of Subadult Protoceratops andrewsi from Djadokhta Formation (Upper Cretaceous, Mongolia)
Protoceratops andrewsi Granger and Gregory, 1923, is one of the most famous Upper Cretaceous horned dinosaurs of Central Asia. It was described from a separate skull found at Bayan Zag locality…
Postcranial morphology of the basal neoceratopsian (Ornithischia: Ceratopsia) Auroraceratops rugosus from the Early Cretaceous (Aptian–Albian) of northwestern Gansu Province, China
TLDR
Most of the phylogenetically relevant characters of the postcranial skeleton in Auroraceratops are a mosaic of features plesiomorphic to Neoceratopsia and features previously considered to be unique to later diverging clades, such as LeptocerAtopsidae and Protocer atopsidae.
The ontogenetic pattern of neurocentral suture closure in the axial skeleton of Hyperodapedontinae (Archosauromorpha, Rhynchosauria) and its evolutionary implications
TLDR
This study indicates that the delayed neurocentral closure may be a paedomorphic heterochronic process in Hyperodapedontinae, as it contrasts with the fully closed neurocentral sutures of early diverging non‐hyperodapingontine rhynchosaurs.
Reconstructions of the Axial Muscle Insertions in the Occipital Region of Dinosaurs: Evaluations of Past Hypotheses on Marginocephalia and Tyrannosauridae Using the Extant Phylogenetic Bracket Approach
TLDR
Many muscle insertions reconstructed in this study were substantially different from those in the past studies, demonstrating the importance of phylogenetically justified inferences based on the conditions of Aves and Crocodylia for reconstructing the anatomy of non‐avian dinosaurs.
New information on the rare horned dinosaur Arrhinoceratops brachyops (Ornithischia: Ceratopsidae) from the Upper Cretaceous of Alberta, Canada
Arrhinoceratops brachyops is a poorly understood chasmosaurine ceratopsid from the Upper Cretaceous Horseshoe Canyon Formation of Alberta, previously described on the basis of only a single skull.…
...
...

References

SHOWING 1-10 OF 49 REFERENCES
The postcranial skeletal anatomy of the carboniferous tetrapod Greererpeton burkemorani Romer, 1969
TLDR
A cladistic analysis indicates that Greererpeton burkemorani shares a more recent common ancestor with the anthracosaur Proterogyrinus scheelei than it does with either Crassigyrinus scoticus or Ichthyostega sp.
The morphology and systematics of Avaceratops, a primitive horned dinosaur from the Judith River Formation (Late Campanian) of Montana, with the description of a second skull
TLDR
The partial skull and skeleton of Avaceratops lammersi, an unusual ceratopsid from the Judith River Formation of central Montana, are described and it is found that it is close to the ancestry of Triceratops and the C...
A gigantic skull and skeleton of the horned dinosaur Pentaceratops sternbergi from New Mexico
An exceptionally large skeleton of Pentaceratops sternbergi (Ornithischia:Ceratopsia) provides for the first time an accurate impression of the body proportions in this horned dinosaur. This is the…
THE SKELETON OF LEPTOCERATOPS WITH THE DESCRIPTION OF A NEW SPECIES BY BARNUM
The known material assignable to the genus Leptoceratops consists of one rather complete skeleton and fragmentary remains of four others. The type, described by the senior writer (1914) as L.…
Chasmosaurus mariscalensis, sp. nov., a new ceratopsian dinosaur from Texas
TLDR
This is the most advanced species of Chasmosaurus and is morphologically intermediate with Pentaceratops in several characters.
The dinosauria: Second edition
The Dinosauria (second edition) is the longawaited update of the 1990 volume of the same name (Weishampel et al. 1990a), which in the past fourteen years has become a fixture on the desks and shelves…
A ceratopsian dinosaur from China and the early evolution of Ceratopsia
TLDR
This new taxon demonstrates that some neoceratopsian characters evolved in a more incremental fashion than previously known and also implies mosaic evolution of characters early in ceratopopsian history.
The Ceratopsian Dinosaurs and Associated Lower Vertebrates from the St. Mary River Formation (Maestrichtian) at Scabby Butte, Southern Alberta
Scabby Butte, a limited exposure of late Cretaceous sediments in southern Alberta, Canada, is an important source for the large ceratopsian dinosaur Pachyrhinosaurus Sternberg. New cranial material…
DESCRIPTION OF PRENOCERATOPS PIEGANENSIS GEN. ET SP. NOV. (DINOSAURIA: NEOCERATOPSIA) FROM THE TWO MEDICINE FORMATION OF MONTANA
TLDR
A new basal neoceratopsian genus and species, Prenocer atops pieganensis, is described from the Two Medicine Formation of Montana, which represents the only bone-bed deposition of a basal neocinglassian currently known, and is almost entirely disarticulated allowing for a more thorough understanding of basal neocerratopsia cranial morphology.
Vertebral Morphology, Alternation of Neural Spine Height, and Structure in Permo-Carboniferous Tetrapods, and a Reappraisal of Primitive Modes of Terrestrial Locomotion
TLDR
It is concluded that a coupled pattern of axial dorsiflexion and rotation played a significant role in primitive terrestrial locomotion.
...
...