Global ETD Search
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Showing 1 to 7 of 7 for “"Birds--Evolution"”.
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Avian Diversification in the Andes: Understanding Endemism Patterns and Historical Biogeography
… roughly one third of all the world's species of birds. Many biogeographical studies have sought to explain the origin and diversification of Andean taxa. However, because of the Andes' extensive latitudinal span and complexity, there is no one single cause of origin or of diversification that can …
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Oviraptorosauria: Morphology, Phylogeny, and Endocranial Evolution
… and numerous skeletal similarities with extant birds instantly made oviraptorosaurs the subject of considerable interest when first discovered in the early 20th Century by the American Museum of Natural History Central Asiatic Expeditions. Subsequent discoveries have only increased the potential …
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Forelimb and Pectoral Anatomy of Arcticodactylus cromptonellus, an Early Pterosaur from the Late Triassic, and the Origins of Pterosaurs
Pterosaurs represent the earliest appearance of only three clades of flying vertebrates, the pioneers of aerial vertebrate ecospace, and the lineage to produce the largest known flying organisms. The origins of the pterosaurian flight apparatus have been difficult to ascertain, in part, due to …
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Locomotor Ontogeny and the Evolution of Avian Flight
… one another. This may be particularly true in birds, which have compartmentalized the single locomotor unit of their ancestors into discrete wing and leg locomotor modules, and exploited terrestrial and aerial environments. Specializing one set of limbs for terrestrial locomotion and one set …
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Locomotor Ontogeny and the Evolution of Avian Flight
… one another. This may be particularly true in birds, which have compartmentalized the single locomotor unit of their ancestors into discrete wing and leg locomotor modules, and exploited terrestrial and aerial environments. Specializing one set of limbs for terrestrial locomotion and one set …
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Ecological Causes of Life History Variation Tested by Meta-analysis, Comparison, and Experimental Approaches
… importance of mortality risk in life history evolution, expanded geographic comparisons of annual and within-year patterns of variance in survival rates is likely key to understanding variation among species in life history traits.</p>
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Ecological Causes of Life History Variation Tested by Meta-analysis, Comparison, and Experimental Approaches
… importance of mortality risk in life history evolution, expanded geographic comparisons of annual and within-year patterns of variance in survival rates is likely key to understanding variation among species in life history traits.</p>