Four-winged dino may be missing link in bird debate - Yahoo! News
It was found in rock dated to the early part of the Late Jurassic, between 151 and 161 million years ago, which means it is clearly older than Archaeopteryx.
Rather than be considered a bird, A. huxleyi is a late member of the Troodontidae, a category of dinosaurs closely related to avians, the study argues.
"This new find refutes the temporal paradox and provides significant information on the temporal framework of theropod divergence," it says.
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