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Re: Avian origins: new analysis confirms ancient beginnings
On Feb 6, 2008 1:50 PM, evelyn sobielski <email@example.com> wrote:
> > least* five lineages
> > (pan-Palaeognathae, pan-Galliformes, pan-Anhimidae,
> > pan-Anseres, and
> > pan-Neoaves) by the end of the Mesozoic.
> Diatryma ancestors would also have been a distinct
> lineage, no?
Whoops, my bad. At least six lineages. (Any other stem-anseriforms
> If you're willing to accept some K-Pg boundary
> seabirds as Procellariifomes (sans tropicbirds) on
> more inference than evidence, there is a whole lot of
> lineages that can be added.
Yes, I would imagine the actual number is probably quite a bit higher
than six, probably including several neoavian lineages. But who knows?
> the pan-ciconiiform-pan-pelecaniform clade
(I think "ciconiiform-pelecaniform clade" or "ciconiiform-pelecaniform
crown group" is sufficient.)
> We have a few bones of
> what seem proto-procellariiforms out there around the
> boundary, but at present nobody tried to check out
> whether they're not simply very plesiomorphic basal
> members of the tubenose-et-al clade.
> > so I don't know where they got the 60 Mya figure from.
> Not from the paper.
Well, that's a relief.
T. Michael Keesey
Director of Technology
2894 Rowena Avenue Ste. B
Los Angeles, California 90039