Feathered Non-Avian Dinosaurs from North America Provide Insight into Wing Origins
Previously described feathered dinosaurs reveal a fascinating record of feather evolution, although substantial phylogenetic gaps remain. Here we report the occurrence of feathers in ornithomimosaurs, a clade of non-maniraptoran theropods for which fossilized feathers were previously unknown. The Or...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2012-10, Vol.338 (6106), p.510-514 |
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| creator | Zelenitsky, Darla K. Therrien, François Erickson, Gregory M. DeBuhr, Christopher L. Kobayashi, Yoshitsugu Eberth, David A. Hadfield, Frank |
| description | Previously described feathered dinosaurs reveal a fascinating record of feather evolution, although substantial phylogenetic gaps remain. Here we report the occurrence of feathers in ornithomimosaurs, a clade of non-maniraptoran theropods for which fossilized feathers were previously unknown. The Ornithomimus specimens, recovered from Upper Cretaceous deposits of Alberta, Canada, provide new insights into dinosaur plumage and the origin of the avian wing. Individuals from different growth stages reveal the presence of a filamentous feather covering throughout life and winglike structures on the fore limbs of adults. The appearance of winglike structures in older animals indicates that they may have evolved in association with reproductive behaviors. These specimens show that primordial wings originated earlier than previously thought, among non-maniraptoran theropods. |
| doi_str_mv | 10.1126/science.1225376 |
| format | Article |
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| ispartof | Science (American Association for the Advancement of Science), 2012-10, Vol.338 (6106), p.510-514 |
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| source | MEDLINE; Science Magazine; JSTOR Archive Collection A-Z Listing |
| subjects | Adults Anatomy & physiology Animal wings Animals Biological Evolution Bones Covering Dinosaurs Dinosaurs - anatomy & histology Dinosaurs - classification Earth sciences Earth, ocean, space Evolution Evolutionary biology Exact sciences and technology Feathers Feathers - anatomy & histology Forelimbs Locomotion North America Origins Paleobiology Paleontology Phylogenetics Phylogeny Plumage Sandstones Skeleton Thermoregulation Ulna Vertebrate paleontology Wings, Animal - anatomy & histology |
| title | Feathered Non-Avian Dinosaurs from North America Provide Insight into Wing Origins |
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