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 6 of 6 for “"Arachnid"”.
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Investigating the role of gene duplication in the evolution and divergence of Arachnids
… understand the impact of this WGD event during arachnid evolution, I identified the homeobox and Sox gene repertoires of Phalangium opilio and compared the embryonic expression patterns of Sox and duplicated homeodomain genes in spiders, and their single copy orthologues in harvestmen. My …
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Pseudoscorpion Systematics & Phylogenetics: Exploring the Effects of Accelerated Rates of Evolution on Both Ancient and Recent Diversification
Like many arthropod lineages, the arachnid order Pseudoscorpiones De Geer, 1778 evolved long enough ago to be present for the coming together and breaking apart of the supercontinent Pangea, the rise and fall of the Dinosaurs, and many iterations of extreme global climatic fluctuations. Roughly 400 …
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Head and protocerebral patterning in the spider Parasteatoda tepidariorum
… arthropod common ancestor. An arachnopulmonate-arachnid, the spider Parasteatoda tepidarium has emerged as one of the main chelicerate model species for evolutionary and developmental biology. The arthropod protocerebrum is derived from the neurogenetic ectoderm of the pre-antennal/cheliceral …
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Modeling and Control of SPIDER Satellite Components
… and versatility of the satellite much like an arachnid weaving its own web. In the present work, a rigorous mathematical framework based on distributed parameter system theory is presented in describing the dynamics of augmented membranous structures. In particular, Euler-Bernoulli beam theory …
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Evolution and Anatomy of Early Terrestrial Arthropods: Insights from the Rhynie Chert
… and many modern animal groups, such as hexapods, arachnids, myriapods, and nematodes, providing a unique glimpse into the world where some of the earliest unequivocal land animals took their first steps. This thesis employs confocal laser scanning microscopy (CLSM) to investigate the anatomical …
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Behavioral and Physiological Ecology of Scorpion Venom Expenditure: Stinging, Spraying, and Venom Regeneration
<p>In this dissertation, I reviewed the functional aspects of venom from a behavioral perspective to develop a comprehensive understanding of the behavioral ecology of venom. To explore the behavioral and physiological ecology of venom expenditure by scorpions, I conducted four studies of the …