News From the Field
Discovery of new Tiktaalik roseae fossils reveals key link in evolution of hind limbs
January 13, 2014
The discovery of well-preserved pelves and a partial pelvic fin from Tiktaalik roseae, a 375-million-year-old transitional species between fish and the first legged animals, reveals that the evolution of hind legs actually began as enhanced hind fins. This challenges existing theory that large, mobile hind appendages were developed only after vertebrates transitioned to land. The fossils are described by scientists in the Proceedings of the National Academy of Sciences.
University of Chicago Medical Center
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