Dinosaurs as ancestors of birds, and birds as descendants of dinosaurs
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چکیده
منابع مشابه
Counting the Fingers of Birds and Dinosaurs
Homologies of the three fingers in birds have been debated for more than a century. Paleontologists have traditionally identified avian digits as I-II-III largely on the basis of phalangeal counts, whereas embryologists number them II-III-IV on the basis of development in the egg. The report by Ann C. Burke and Alan Feduccia (1) is a synthesis of the embryological evidence. They observe that in...
متن کاملRespiratory and reproductive paleophysiology of dinosaurs and early birds.
In terms of their diversity and longevity, dinosaurs and birds were/are surely among the most successful of terrestrial vertebrates. Unfortunately, interpreting many aspects of the biology of dinosaurs and the earliest of the birds presents formidable challenges because they are known only from fossils. Nevertheless, a variety of attributes of these taxa can be inferred by identification of sha...
متن کاملEvolution of olfaction in non-avian theropod dinosaurs and birds.
Little is known about the olfactory capabilities of extinct basal (non-neornithine) birds or the evolutionary changes in olfaction that occurred from non-avian theropods through modern birds. Although modern birds are known to have diverse olfactory capabilities, olfaction is generally considered to have declined during avian evolution as visual and vestibular sensory enhancements occurred in a...
متن کاملEvolution: How Some Birds Survived When All Other Dinosaurs Died
The end-Cretaceous mass extinction wiped out the dinosaurs, including many birds. But some bird lineages survived. May seed-eating have been the key?
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ژورنال
عنوان ژورنال: Japanese Journal of Ornithology
سال: 2018
ISSN: 0913-400X,1881-9710
DOI: 10.3838/jjo.67.7