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Temporal paradox (paleontology)
(詳細はpaleornithologist Alan Feduccia in 1994.〔Feduccia, Alan (1996) "The Origin and Evolution of Birds." Yale University Press. New Haven, Conn. USA.〕
==Objection to consensus==
The concept of a "temporal paradox" is based on the following facts. The consensus view is that birds evolved from dinosaurs, but the most bird-like dinosaurs, including almost all of the feathered dinosaurs and those believed to be most closely related to birds are known mostly from the Cretaceous, by which time birds had already evolved and diversified. If bird-like dinosaurs are the ancestors of birds they should, then, be older than birds, but ''Archaeopteryx'' is 155 million years old, while the very bird-like ''Deinonychus'' is 35 million years younger. This idea is sometimes summarized as "you can't be your own grandmother". As Dodson pointed out:
I hasten to add that none of the known small theropods, including ''Deinonychus'', ''Dromaeosaurus'', ''Velociraptor'', ''Unenlagia'', nor ''Sinosauropteryx'', ''Protarchaeopteryx'', nor ''Caudipteryx'' is itself relevant to the origin of birds; these are all Cretaceous fossils ... and as such can at best represent only structural stages through which an avian ancestor may be hypothezised to have passed.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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