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
Lokiceratops rangiformis gen. et sp. nov. (Ceratopsidae: Centrosaurinae) from the Campanian Judith River Formation of Montana reveals rapid regional radiations and extreme endemism within centrosaurine dinosaurs [PDF]
PeerJThe Late Cretaceous of western North America supported diverse dinosaur assemblages, though understanding patterns of dinosaur diversity, evolution, and extinction has been historically limited by unequal geographic and temporal sampling.
Mark A. Loewen +10 more
doaj +6 more sources
A New Centrosaurine Ceratopsid, Machairoceratops cronusi gen et sp. nov., from the Upper Sand Member of the Wahweap Formation (Middle Campanian), Southern Utah. [PDF]
PLoS ONE, 2016 The Upper Cretaceous (middle-late Campanian) Wahweap Formation of southern Utah contains the oldest diagnostic evidence of ceratopsids (to date, all centrosaurines) in North America, with a number of specimens recovered from throughout a unit that spans ...
Eric K Lund +3 more
doaj +6 more sources
A new southern Laramidian ankylosaurid, Akainacephalus johnsoni gen. et sp. nov., from the upper Campanian Kaiparowits Formation of southern Utah, USA [PDF]
PeerJ, 2018 A partial ankylosaurid skeleton from the upper Campanian Kaiparowits Formation of southern Utah is recognized as a new taxon, Akainacephalus johnsoni, gen. et sp. nov.
Jelle P. Wiersma, Randall B. Irmis
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The first dinosaur from Washington State and a review of Pacific coast dinosaurs from North America. [PDF]
PLoS ONE, 2015 We describe the first diagnostic dinosaur fossil from Washington State. The specimen, which consists of a proximal left femur, was recovered from the shallow marine rocks of the Upper Cretaceous (Campanian) Cedar District Formation (Nanaimo Group) and is
Brandon R Peecook, Christian A Sidor
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Tyrant dinosaur evolution tracks the rise and fall of Late Cretaceous oceans. [PDF]
PLoS ONE, 2013 The Late Cretaceous (∼95-66 million years ago) western North American landmass of Laramidia displayed heightened non-marine vertebrate diversity and intracontinental regionalism relative to other latest Cretaceous Laurasian ecosystems.
Mark A Loewen +4 more
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New horned dinosaurs from Utah provide evidence for intracontinental dinosaur endemism. [PDF]
PLoS ONE, 2010 BackgroundDuring much of the Late Cretaceous, a shallow, epeiric sea divided North America into eastern and western landmasses. The western landmass, known as Laramidia, although diminutive in size, witnessed a major evolutionary radiation of dinosaurs ...
Scott D Sampson +6 more
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Rise of the king: Gondwanan origins and evolution of megaraptoran dinosaurs [PDF]
Royal Society Open ScienceLate Cretaceous Earth was dominated by theropods such as tyrannosauroids and megaraptorans; however, it is unclear how these clades diversified and grew to massive proportions.
Cassius Morrison +9 more
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A tyrannosauroid metatarsus from the Merchantville Formation of Delaware increases the diversity of non-tyrannosaurid tyrannosauroids on Appalachia [PDF]
PeerJ, 2017 During the Late Cretaceous, the continent of North America was divided into two sections: Laramidia in the west and Appalachia in the east. Although the sediments of Appalachia recorded only a sparse fossil record of dinosaurs, the dinosaur faunas of ...
Chase D. Brownstein
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A large tyrannosaurid from the Late Cretaceous (Campanian) of North America [PDF]
Scientific ReportsThe Tyrannosauridae emerged as the dominant large predators in Laurasia during the Late Cretaceous. Their evolution in North America culminated with the replacement of Albertosaurinae, Daspletosaurinae, and Teratophonei, with masses of 2-3 tonnes, by the
Nicholas R. Longrich +3 more
doaj +2 more sources