An Immature Pachyrhinosaurus perotorum (Dinosauria: Ceratopsidae) Nasal Reveals Unexpected Complexity of Craniofacial Ontogeny and Integument in Pachyrhinosaurus [PDF]
PLoS ONE, 2013 A new specimen attributable to an immature individual of Pachyrhinosaurus perotorum (Dinosauria, Ceratopsidae) from the Kikak-Tegoseak Quarry in northern Alaska preserves a mix of features that provides refinement to the sequence of ontogenetic stages ...
Anthony Fiorillo, Ronald S Tykoski
exaly +9 more sources
Long-horned Ceratopsidae from the Foremost Formation (Campanian) of southern Alberta [PDF]
PeerJ, 2018 The horned Ceratopsidae represent one of the last radiations of dinosaurs, and despite a decade of intense work greatly adding to our understanding of this diversification, their early evolution is still poorly known. Here, two postorbital horncores from
Caleb M. Brown
doaj +10 more sources
The first reported ceratopsid dinosaur from eastern North America (Owl Creek Formation, Upper Cretaceous, Mississippi, USA) [PDF]
PeerJ, 2017 Ceratopsids (“horned dinosaurs”) are known from western North America and Asia, a distribution reflecting an inferred subaerial link between the two landmasses during the Late Cretaceous.
Andrew A. Farke, George E. Phillips
doaj +8 more sources
A new leptoceratopsid (Ornithischia: Ceratopsia) from the Upper Cretaceous of Shandong, China and its implications for neoceratopsian evolution. [PDF]
PLoS ONE, 2010 BackgroundThe ceratopsians represent one of the last dinosaurian radiations. Traditionally the only universally accepted speciose clade within the group was the Ceratopsidae.
Xing Xu +4 more
doaj +4 more sources
A New Specimen of the Controversial Chasmosaurine Torosaurus latus (Dinosauria: Ceratopsidae) from the Upper Cretaceous Hell Creek Formation of Montana. [PDF]
PLoS ONE, 2016 Torosaurus latus is an uncommon and contentious taxon of chasmosaurine ceratopsid known from several upper Maastrichtian units in western North America. We describe a partial parietal of To. latus from the Hell Creek Formation of Montana.
Andrew T McDonald +2 more
doaj +4 more sources
New insights into chasmosaurine (Dinosauria: Ceratopsidae) skulls from the Upper Cretaceous (Campanian) of Alberta, and an update on the distribution of accessory frill fenestrae in Chasmosaurinae [PDF]
PeerJ, 2018 Chasmosaurine ceratopsids are well documented from the Upper Cretaceous (Campanian) Dinosaur Park Formation (DPF) of southern Alberta and Saskatchewan, and include Chasmosaurus belli, Chasmosaurus russelli, Mercuriceratops gemini, Vagaceratops irvinensis,
James A. Campbell +4 more
doaj +6 more sources
A subadult specimen of Rubeosaurus ovatus (Dinosauria: Ceratopsidae), with observations on other ceratopsids from the two medicine formation. [PDF]
PLoS ONE, 2011 BackgroundCentrosaurine ceratopsids are well known from the middle Campanian Upper Two Medicine Formation of Montana. Four taxa have been named: Brachyceratops montanensis, Rubeosaurus ovatus, Einiosaurus procurvicornis, and Achelousaurus horneri ...
Andrew T McDonald
doaj +5 more sources
Mountain building triggered late cretaceous North American megaherbivore dinosaur radiation. [PDF]
PLoS ONE, 2012 Prior studies of Mesozoic biodiversity document a diversity peak for dinosaur species in the Campanian stage of the Late Cretaceous, yet have failed to provide explicit causal mechanisms.
Terry A Gates +2 more
doaj +4 more sources
The record ofTorosaurus(Ornithischia: Ceratopsidae) in Canada and its taxonomic implications [PDF]
Zoological Journal of the Linnean Society, 2022 AbstractThe horned dinosaur genus Torosaurus has a challenging history, relating both to its geographic distribution and taxonomy. Whereas Torosaurus has been reported from Upper Maastrichtian deposits in Canada, which would mark the northernmost range of the genus, recent work has questioned the generic identity of the implicated material, which ...
Mallon, Jordan C. +3 more
openaire +3 more sources
The structure and relationships of the horned dinosaur Arrhinoceratops Parks(Ornithischia: Ceratopsidae) [PDF]
Canadian Journal of Earth Sciences, 1981 Only the type specimen of Arrhinoceratops brachyops Parks can be assigned without question to the ceratopsid genus Arrhinoceratops. The original description, however, requires revision. Contrary to published accounts, a nasal horn core is present, the jugal cannot be characterized by an unusually long anterior process, and there is no nasal–rostral ...
Jordan C. Mallon +2 more
core +7 more sources