Results 211 to 220 of about 2,665 (231)
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Pachycephalosaurs and Ceratopsians (Ornithischia: Marginocephalia)
Short Courses in Paleontology, 1989Explanatory scenarios for the evolution of dinosaur anatomy are often couched in terms of competitive advantage, with those animals of superior design overtaking those that are slower and less efficient. Many, if not the majority, of the most striking structural modifications, however, are the product of competition and display between conspecifics ...
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British plated dinosaurs (Ornithischia, Stegosauridae)
Journal of Vertebrate Paleontology, 1985ABSTRACT All specimens of the Stegosauridae from England are described. The material from the lower and upper Bathonian (Middle Jurassic) of Oxfordshire and Gloucestershire is the earliest record of the family. The holotype femur of Omosaurus vetustus Huene is tentatively referred to the genus Lexovisaurus Hoffstetter as L.?
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Evolution of Bird-Hipped Dinosaurs (Ornithischia)
Short Courses in Paleontology, 1989By the end of the last century, the assortment of dinosaur skeletons that had already accumulated were classified into two groups of approximately equal size based on the divergent plan of their hip bones: Saurischia, the “lizard-hipped” dinosaurs, and Ornithischia, the “bird-hipped” dinosaurs (Seeley, 1888).
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Osteology of the Patagonian ornithopodTalenkauen santacrucensis(Dinosauria, Ornithischia)
Journal of Systematic Palaeontology, 2019Talenkauen santacrucensis represents one of the most complete South American ornithopods yet discovered.
Rozadilla, Sebastian +2 more
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English hypsilophodontid dinosaurs (Reptilia: Ornithischia)
1975(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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AN OSSIFIED TENDON TRELLIS IN CHASMOSAURUS (ORNITHISCHIA: CERATOPSIDAE)
Journal of Paleontology, 2007The ornithischia and its sister group, the Saurischia, comprise the Dinosauria. Ornithischians (Weishampel, 2004) are a diverse group of primarily quadrupedal herbivores that include such familiar dinosaurs as the armored stegosaurs and ankylosaurs (Thyreophora), as well as the duckbilled hadrosaurs, pachycephalosaurs, and ceratopsians (Cerapoda).
ROBERT HOLMES, CHRISTOPHER ORGAN
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Description of the lower jaw of Stegosaurus (Reptilia, Ornithischia)
Annals of the Carnegie Museum, 1986(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Berman, David S., McIntosh, John S.
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The Palatal Structure of some Canadian Hadrosauridae (Reptilia: Ornithischia)
Canadian Journal of Earth Sciences, 1972Two distinct hadrosaurian lineages can be delineated, each showing changes from possible hypsilophodont ancestors. The Hadrosaurinae are typified by moderately vaulted palates, broad pterygoid flanges, large anterior maxillary processes, and non-folded premaxillae, with direct narial passages.
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External and internal structure of ankylosaur (Dinosauria; Ornithischia) osteoderms
2010Here I assess the use of osteoderms in systematics with comparative material from fossil and extant tetrapod taxa. Putative differences among three groups (ankylosaurid, nodosaurid, and polacanthid) were evaluated. Archosaur osteoderms have cortices surrounding a cancellous core.
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