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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 2 of 2 (0.067 seconds)Spelling suggestions: "subject:"foraminacephale"" "subject:"graminaceae""
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Ontogeny, Diversity, and Systematics of Pachycephalosaur Dinosaurs from the Belly River Group of AlbertaSchott, Ryan K. 31 May 2011 (has links)
Pachycephalosaur diversity and systematics is poorly resolved, mainly due to the incomplete nature of their remains. The largest sample of pachycephalosaurs is from the Belly River Group of Alberta, but this sample is also the most problematic in terms of alpha taxonomic diversity. Material from this assemblage has been proposed to represent from a single species to up to four distinct genera. Each of these views depends on different interpretations of morphology, ornamentation, ontogeny, and sexual dimorphism, but none have been adequately tested. Here I analyze the diversity of pachycephalosaurs with particular emphasis on Stegoceras validum and 'Prenocephale' brevis. The ontogeny of these species is described using comparative morphology, histology, and morphometrics. New specimens are described and the first detailed pachycephalosaur growth series supported by multiple, independent lines of evidence is presented. Phylogenetic analysis utilizing results from this study provides a new hypothesis for the evolutionary relationships of pachycephalosaurs.
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Ontogeny, Diversity, and Systematics of Pachycephalosaur Dinosaurs from the Belly River Group of AlbertaSchott, Ryan K. 31 May 2011 (has links)
Pachycephalosaur diversity and systematics is poorly resolved, mainly due to the incomplete nature of their remains. The largest sample of pachycephalosaurs is from the Belly River Group of Alberta, but this sample is also the most problematic in terms of alpha taxonomic diversity. Material from this assemblage has been proposed to represent from a single species to up to four distinct genera. Each of these views depends on different interpretations of morphology, ornamentation, ontogeny, and sexual dimorphism, but none have been adequately tested. Here I analyze the diversity of pachycephalosaurs with particular emphasis on Stegoceras validum and 'Prenocephale' brevis. The ontogeny of these species is described using comparative morphology, histology, and morphometrics. New specimens are described and the first detailed pachycephalosaur growth series supported by multiple, independent lines of evidence is presented. Phylogenetic analysis utilizing results from this study provides a new hypothesis for the evolutionary relationships of pachycephalosaurs.
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