I quickly glanced at the paper. What they seem to be claiming is that there is a lack of genetic variation in the set of DNA they examined that indicates a lot of species went through population bottlenecks a couple hundred thousand years ago.
Not as fantastical as species suddenly appearing, but still incredible enough that JonF's post makes me doubt the paper.
Added by edit:
Oops. Now AZPaul added a more relevant post than mine. Never mind.
Edited by Chiroptera, : No reason given.
Progress is not an illusion, it happens, but it is slow and invariably disappointing. - George Orwell
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