A Centrosaurine (Dinosauria: Ceratopsia) from the Aguja Formation (Late Campanian) of Northern Coahuila, Mexico. [PDF]
PLoS ONE, 2016 While centrosaurines and ceratopsids in general are abundant in the Late Campanian of northern Laramidia, they are much less commonly found in southern Laramidia. This has supported hypotheses of dinosaur provinciality and endemism in the Late Cretaceous
Héctor E Rivera-Sylva +2 more
doaj +5 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 +5 more sources
Correction: A New Taxon of Basal Ceratopsian from China and the Early Evolution of Ceratopsia. [PDF]
PLoS ONE, 2016 There is an error in the caption title for Fig 6, “The squamosal of Yinlong downsi (IVPP V18641).” Please see the complete, correct Fig 6 caption here. Fig 6 The squamosal of Hualianceratops wucaiwanensis (IVPP V18641).
Fenglu Han +3 more
doaj +4 more sources
High-resolution computed tomographic analysis of tooth replacement pattern of the basal neoceratopsian Liaoceratops yanzigouensis informs ceratopsian dental evolution [PDF]
Scientific Reports, 2018 The dental morphology and tooth replacement pattern of Liaoceratops yanzigouensis, the earliest known neoceratopsian, are important for our understanding of the evolution of the ceratopsian dental system.
Yiming He +3 more
doaj +2 more sources
Information in morphological characters. [PDF]
Ecol Evol, 2021 Resembling a communication system, the fundamental problem of paleontological studies is reconstructing at present either exactly or approximately organisms living in another age. Information theory provides a new perspective in paleontological systematic studies.
Yu C +4 more
europepmc +2 more sources
Cranial Anatomy of Wendiceratops pinhornensis gen. et sp. nov., a Centrosaurine Ceratopsid (Dinosauria: Ornithischia) from the Oldman Formation (Campanian), Alberta, Canada, and the Evolution of Ceratopsid Nasal Ornamentation. [PDF]
PLoS ONE, 2015 The fossil record of ceratopsid dinosaurs between the occurrence of their proximate sister taxa in the Turonian and the beginning of their well-documented radiation from the late Campanian of North America onwards (approximately 90 and 77 Ma) is poor ...
David C Evans, Michael J Ryan
doaj +2 more sources
Modularity and heterochrony in the evolution of the ceratopsian dinosaur frill. [PDF]
Ecol Evol, 2020 We find support for peramorphic evolution of the frill of ceratopsian dinosaurs, likely facilitated by the decoupling of this structure from jaw musculature. Abstract The fossil record provides compelling examples of heterochrony at macroevolutionary scales such as the peramorphic giant antlers of the Irish elk.
Prieto-Márquez A +4 more
europepmc +2 more sources
A neoceratopsian dinosaur from the early Cretaceous of Mongolia and the early evolution of ceratopsia. [PDF]
Commun Biol, 2020 AbstractCeratopsia is a diverse dinosaur clade from the Middle Jurassic to Late Cretaceous with early diversification in East Asia. However, the phylogeny of basal ceratopsians remains unclear. Here we report a new basal neoceratopsian dinosaurBeg tsebased on a partial skull from Baruunbayan, Ömnögovi aimag, Mongolia.Begis diagnosed by a unique ...
Yu C +4 more
europepmc +6 more sources
Comparative cranial osteology of subadult eucentrosauran ceratopsid dinosaurs from the Two Medicine Formation, Montana, indicates sequence of ornamentation development and complex supraorbital ontogenetic change [PDF]
Acta Palaeontologica Polonica, 2021 The eucentrosauran centrosaurines Einiosaurus procurvicornis and Achelousaurus horneri are the two most commonly recovered ceratopsids from the Campanian Two Medicine Formation of northwestern Montana, USA.
JOHN P. WILSON, JOHN B. SCANNELLA
doaj +1 more source
Skull morphology and histology indicate the presence of an unexpected buccal soft tissue structure in dinosaurs. [PDF]
J AnatA combined approach of osteology and histology was used to examine the cheek regions of dinosaurs. Strong evidence was found for a soft tissue in this region connecting the zygoma to the mandible, here named the ‘exoparia’. Abstract Unlike mammals, reptiles typically lack large muscles and ligaments that connect the zygoma to the mandible.
Sharpe HS +7 more
europepmc +2 more sources