A reevaluation of the manus structure inTriceratops(Ceratopsia: Ceratopsidae)
Journal of Vertebrate Paleontology, 2009 ABSTRACT A Triceratops, NSM PV 20379, excavated from the Upper Cretaceous Hell Creek Formation, Bowman County, North Dakota, USA, confirms the articulation of the right forearm. Detailed study of the forelimb anatomy presented here indicates the manus is in a semi-supinated orientation.
Shin-Ichi Fujiwara
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Variation in the shape and mechanical performance of the lower jaws in ceratopsid dinosaurs (Ornithischia, Ceratopsia) [PDF]
Journal of Anatomy, 2015 AbstractCeratopsidae represents a group of quadrupedal herbivorous dinosaurs that inhabited western North America and eastern Asia during the Late Cretaceous. Although horns and frills of the cranium are highly variable across species, the lower jaw historically has been considered to be relatively conservative in morphology.
Maiorino, Leonardo +4 more
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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
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Histologic Examination of an Assemblage of Psittacosaurus (Dinosauria: Ceratopsia) Juveniles From the Yixian Formation (Liaoning, China) [PDF]
The Anatomical Record, 2016 ABSTRACTPsittacosaurus is one of the most abundant dinosaurs known, which allows for extensive study of its growth and form. Previous studies have evaluated growth trajectories of Psittacosaurus using bone histology. However, we present the first study of Psittacosaurus comparative juvenile histology and describe the histology of Psittacosaurus within ...
Zhao, Bo +6 more
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The Forelimb and Pectoral Girdle of Pachyrhinosaurus lakustai (Ceratopsia, Centrosaurinae)
, 2020 Ceratopsidae is a group of non-avian dinosaurs known for their distinctive cranial ornamentation and horns. This ornamentation has become the focal point of ceratopsid research and therefore has led to a state of affairs in ceratopsid palaeontology in which taxa are diagnosed on the basis of cranial morphology and the postcranial skeleton is generally ...
Vice, Rebekah Marion
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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
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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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Comparative craniology of the Ceratopsia
American Journal of Science, 1993 P. Dodson
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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
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Montanoceratops cerorhynchus(Dinosauria: Ceratopsia) and relationships among basal neoceratopsians
Journal of Vertebrate Paleontology, 1998 ABSTRACT Montanoceratops cerorhynchus has been described as the sister group of Ceratopsidae, even though analyses and diagnosis of this taxon have been tentative and incomplete. A second specimen of M. cerorhynchus includes new diagnostic elements, most notably a partial skull including the caudal half of the braincase, pectoral girdle and manus ...
Brenda J. Chinnery, David B. Weishampel
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