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Re: Removing segnosaurs from ...



>>If you wish to be a strict Dollist (Dolloist?  sp.), sure.  If not, you can
>>recognize that homeobox genes show that there really aren't any significant
>>morphological characters that can't be reversed.
>
>Yeah--With a great deal of biotech effort, we can get birds to regrow the
>teeth they lost. But how often does this happen in the wild? And how would we
>identify such a case from the fossil record?

The only example I can think of (which may or may not be relevant) is the
reversion to six (or more) fingers in humans. This is not an uncommon
occurance. I don't know if it is a real reversion or a simple mutation (if
there is a difference).

James Shields