Share This Author
New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur Endemism
Two new, co-occurring ceratopsids from the Upper Cretaceous Kaiparowits Formation of Utah are described that provide the strongest support to date for the dinosaur provincialism hypothesis and further suggest the presence of latitudinally arrayed evolutionary centers of endemism within chasmosaurine cer atopsids during the late Campanian.
Frontal sinuses and head-butting in goats: a finite element analysis
- A. Farke
- BiologyJournal of Experimental Biology
- 1 October 2008
Frontal sinuses in goats and other mammals have been hypothesized to function as shock absorbers, protecting the brain from blows during intraspecific combat, and models with sinuses exhibited a more `efficient' distribution of stresses, consistent with the hypothesis that sinuses result at least in part from the removal of mechanically unnecessary bone.
Evolution and functional morphology of the frontal sinuses in Bovidae (Mammalia: Artiodactyla), and implications for the evolution of cranial pneumaticity
- A. Farke
- 1 August 2010
The frontal sinuses from 62 species of bovids were investigated using X-ray computed tomography, and hitherto undescribed diversity in the morphology of this sinus was revealed, suggesting that it was probably present in the common ancestor of Bovidae.
A Ceratopsian Dinosaur from the Lower Cretaceous of Western North America, and the Biogeography of Neoceratopsia
Biogeographically, A. americanus probably originated via a dispersal from Asia into North America; the exact route of this dispersal is ambiguous, although a Beringian rather than European route seems more likely in light of the absence of ceratopsians in the Early Cretaceous of Europe.
MORPHOLOGY AND ONTOGENY OF THE CORNUAL SINUSES IN CHASMOSAURINE DINOSAURS (ORNITHISCHIA: CERATOPSIDAE)
- A. Farke
- Environmental ScienceJournal of Paleontology
- 1 July 2006
Ceratopsids, horned herbivorous ornithischians from the Cretaceous of North America, are unique among dinosaurs in the form and expression of their cranial ornamentation. All ceratopsid genera…
Evolution, Homology, and Function of the Supracranial Sinuses in Ceratopsian Dinosaurs
- A. Farke
- 1 September 2010
The development of a closed sinus in ceratopsids from an open depression was probably associated with an increase in skull size and the accompanying relatively greater loads applied to the horns (in order to maintain the structural integrity of the skull), as well as an anatomical reorganization of the ceramicatopsian skull.
Ontogeny in the tube-crested dinosaur Parasaurolophus (Hadrosauridae) and heterochrony in hadrosaurids
- A. Farke, Derek J. Chok, A. Herrero, Brandon Scolieri, S. Werning
- Environmental SciencePeerJ
- 22 October 2013
The skull and skeleton of a juvenile Parasaurolophus from the late Campanian-aged Kaiparowits Formation of southern Utah, USA, represents the smallest and most complete specimen yet described for this taxon.
A New Centrosaurine from the Late Cretaceous of Alberta, Canada, and the Evolution of Parietal Ornamentation in Horned Dinosaurs
In 1916, a centrosaurine dinosaur bonebed was excavated within the Campanian-aged deposits of what is now Dinosaur Provincial Park, Alberta, Canada. Specimens from this now-lost quarry, including two…
Anatomy and Taxonomic Status of the Chasmosaurine Ceratopsid Nedoceratops hatcheri from the Upper Cretaceous Lance Formation of Wyoming, U.S.A
- A. Farke
- Environmental SciencePloS one
- 20 January 2011
N. hatcheri is tentatively considered valid, and closely related to Triceratops spp, indicating that species richness for chasmosaurine ceratopsids in the Lance Formation just prior to the Cretaceous-Paleocene extinction was roughly equivalent to that earlier in the Cretsaceous.
Ontogeny and the fossil record: what, if anything, is an adult dinosaur?
The current methods available to determine the age of non-avialan dinosaurs are reviewed, the definitions of different ontogenetic stages are discussed, and a growing body of evidence suggests that many dinosaurs that would be considered ‘adults’ in a modern-day field study are considered ’juveniles’ or ‘subadults' in palaeontological contexts.