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RE: Who says dromaeosaurs can't fly?
At 03:12 PM 16/09/02 +0000, Brian Lauret wrote:
I think we're getting a bit off subject by now.But I do want to give my
view on the entire issue.
I personally think the earliest evolution of birds may be unresolvable by
cladistic methods because I view the earliest bird (this is very debatable
of course,it's totally conjectural from my side) as the earliest arboreal
dinosaur with at the ability to fly.
Well, on what basis do you make this assumption? What is an "ability to
fly", anyway? And why are you defining a taxonomic group on an
undemonstrable and unmeasurable character (rather than, say, a set of
reasonably unequivocal morphological features)? It seems to me the problem
is with your definition of birds, not with cladistic methods. But I don't
see why cladistics cannot be used to define any taxonomic group including
all species stemming from a common ancestor, whatever that ancestor was.
Ronald I. Orenstein Phone: (905) 820-7886
International Wildlife Coalition Fax/Modem: (905) 569-0116
1825 Shady Creek Court
Mississauga, Ontario, Canada L5L 3W2 mailto:email@example.com