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Re: Postorbital processes on jugals
Assuming that the said processes have only been lost in mononykines and
the "non-confuciusornithid ornithothoraceans" (mercy, how about that for a
phrase to torture the speaker's mouth and the listener's brain)---- why
would a single loss (plus a reversal) be preferable to two independent
I guess it depends on what the function of the process is, but off
hand, it seems like two independent losses might be more likely than one
loss and a reversal. Both scenarios require two steps, so the question
arises whether a reversal (re-acquisition) would be less likely than an
Therefore, I would discourage you from viewing this loss as a
synapomorphy. It's a very "iffy" character, and I think you are more likely
to be wrong as right.
------ Ken Kinman
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