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Re: Metaves and Coronaves
David Marjanovic wrote:
The clade which includes all but the hoatzin does have a bootstrap of a bit
over 50. (Which is why I wondered whether the proposed morphological
synapomorphies of hoatzin + seriemas could be neoavian synapomorphies.)
I think you mean "neoavian plesiomorphies" here. I get your drift though.
The idea that seriemas and hoatzins are closely related (and to
phorusrhacoids too) is not new, and has been proposed by Mourer-Chauvire and
Olson. For example, the carpometacarpus of these birds shows similarities.
Olson (1985) put forward a New World clade that includes all of these birds,
plus a group of raptors called the caracaras (Polyborinae - almost always
put in the Falconidae).