Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Hominoids."”.
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Evolution of the Hominoid Vertebral Column
… of vertebral formulae in living and extinct hominoids. These processes are fundamental to the emergence of morphological structures and reflect similarity by common descent (homology) or similarity by independent evolution (homoplasy). Although the ""short backs,"" reflecting reduced lumbar …
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The Effect of Population History on Hominoid Intraspecific Cranial Shape Diversity: Combining Population Genetic and 3D Geometric Morphometric Data
<p>Cranial shape diversity within hominoids has been previously studied with the aim of understanding how levels of diversity in extant species compare with extinct hominin specimens. This dissertation addresses the question of why cranial shape diversity differs among extant hominoids. Levels of …
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Functional morphology of mammalian sacra and caudal vertebrae : implications for tail loss and positional behaviors in extinct primates
All living hominoids are characterized by taillessness and adaptations to orthograde (upright) trunk posture. Accordingly, these features have importance for our understanding of ape origins, evolutionary relationships and positional behaviors. Despite extensive study of the hominoid postcranial …
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The Ape Ecological Niche: Posture and Hand Use in Gibbons and Macaques and the Influence of Manual Skill on Cognitive Development in Apes and Humans
… stage for enhanced cognitive abilities in early hominoids. The primary hypothesis is that if single-handed prehensility is enhanced by suspensory orthogrady, then we may predict ape feeding style will differ significantly from that of pronograde monkeys, allowing them to access foods in unique …
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Comparative population genetics of the Hominoidea: An investigation of locus-specific and genome-wide influences
… revealed patterns of variation across all hominoids that are consistent with a model of high variance in male reproductive success: relatively high mitochondrial DNA diversity, relatively low Y chromosome diversity, and intermediate X and autosomal diversity. Examination of orangutan …
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Paranthropus paradoxes: Patterns of morphological variation in East African 'robust australopithecines'
… P. boisei fossil mandibles to those of living hominoids reveal the first sex estimation of individual fossils with an associated statistical likelihood, and a unique expression of sexual dimorphism in the extinct group. Further analyses reveal that the high morphological variability observed is …
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A morphometric study of cranial shape in the Hominoidea
… phenetic relationships of the crania of extant hominoids are examined using data obtained by a variety of new (shape factors, least squares, and Fourier analysis) and more traditional (dimensions, angles and indices) approaches to morphological description. The analysis concentrates on a …
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Paleoclimate and paleoecology of Miocene Eastern African primate habitats : a multiproxy approach.
Reconstructing Miocene climate and ecosystem in eastern Africa is essential for understanding the environmental and geological contexts in which early primates evolved. Particularly, correlations between leaf size, shape, temperature, and precipitation have become a widely used tool for …
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Miocene paleoenvironments and paleosol pH proxies.
Paleoenvironmental analysis is an interdisciplinary endeavor that draws on sedimentology, stratigraphy, geochemistry, and geostatistics. This dissertation includes two paleoenvironmental case studies and the development of a new suite of proxies for soil pH. The first case study was performed at …