The phylogenetic nomenclature of ornithischian dinosaurs. [PDF]
PeerJ, 2021 Ornithischians form a large clade of globally distributed Mesozoic dinosaurs, and represent one of their three major radiations. Throughout their evolutionary history, exceeding 134 million years, ornithischians evolved considerable morphological ...
Madzia D +5 more
europepmc +4 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
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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
The exquisitely preserved integument of Psittacosaurus and the scaly skin of ceratopsian dinosaurs. [PDF]
Commun Biol, 2022 The Frankfurt specimen of the early-branching ceratopsian dinosaur Psittacosaurus is remarkable for the exquisite preservation of squamous (scaly) skin and other soft tissues that cover almost its entire body.
Bell PR +4 more
europepmc +4 more sources
Palaeontology, Volume 65, Issue 3, May/June 2022., 2022 Abstract Little is known about the large‐scale evolutionary patterns of skull size relative to body size, and the possible drivers behind these patterns, in Archosauromorpha. For example, the large skulls of erythrosuchids, a group of non‐archosaurian archosauromorphs from the Early and Middle Triassic, and of theropod dinosaurs are regarded as ...
Jordan Bestwick +8 more
wiley +1 more source
Craniofacial ontogeny in Centrosaurus apertus [PDF]
PeerJ, 2014 Centrosaurus apertus, a large bodied ceratopsid from the Late Cretaceous of North America, is one of the most common fossils recovered from the Belly River Group.
Joseph A. Frederickson +1 more
doaj +2 more sources
A basal ceratopsian with transitional features from the Late Jurassic of northwestern China [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2006 Xing Xu, Jinyou Mo
exaly +2 more sources
The postcranial skeleton of Vagaceratops irvinensis (Dinosauria, Ceratopsidae)
Vertebrate Anatomy, Morphology, Palaeontology, 2014 The postcranial skeleton of Vagaceratops (= Chasmosaurus) irvinensis (CMN 41357), lacking only the tail, most of the left front and left hind limbs, and portions of the pelvis, is preserved in articulation.
Robert B Holmes
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Males resemble females. re-evaluating sexual dimorphism in protoceratops andrewsi (neoceratopsia, protoceratopsidae) [PDF]
, 2015 BACKGROUND: Protoceratops andrewsi (Neoceratopsia, Protoceratopsidae) is a well-known dinosaur from the Upper Cretaceous of Mongolia. Some previous workers hypothesized sexual dimorphism in the cranial shape of this taxon, using qualitative and ...
Farke, Andrew A. +3 more
core +7 more sources
Bone histology of Protoceratops andrewsi from the Late Cretaceous of Mongolia and its biological implications [PDF]
Acta Palaeontologica Polonica, 2018 Protoceratops andrewsi is one of the best known and abundant ornithischian dinosaurs from the Djadokhta Formation (Late Cretaceous, Mongolia) and a subject of many morphological studies.
Łucja Fostowicz-Frelik +1 more
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