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Re: Ah ha! That's where therizinosaurs came from
Gregory Paul wrote:
> Someone said something about it not being possible to tell if a flightless
> tetrapod with flight related features is neoflightless or not. We know
> all current flightless birds are neoflightless.
It was me that wrote that there is no unambiguous anatomical evidence that
ratites had flying ancestors. I wrote that the way we can infer that they
are secondarily flightless is in phylogenetic context - since so many
birds that were more primitive flew. Thus the only way to demonstrate
neoflightlessness in their case is phylogenetic, not anatomical, analysis.
Would you agree?
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