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Re: 11th specimen of Archaeopteryx
On 'non-specialization for an arboreal lifestyle', Darren Naish has
pointed this out a few times before and I can't bear not to repeat it
Granted, that's not the same as the arguement over whether A. and
other species ARE specially adapted for an arboreal lifestyle.
On Sun, Oct 23, 2011 at 11:36 AM, Don Ohmes <email@example.com> wrote:
> On 10/23/2011 1:55 AM, Tim Williams wrote:
>> Examination of the pes shows that the hallux was fairly short and not
>> reversed, contradicting what one would expect in a perching bird.
>> Examination of the entire skeleton shows beyond doubt that
>> _Archaeopteryx_ was not specialized for an arboreal lifestyle.
> It is worth mentioning that cycads and plants with similar morphology can be
> easily utilized as perches, roosts, havens and restaurants by animals whose
> lifestyle could be characterized functionally by the term 'turkey w/ teeth'
> -- I am not saying that Arch. definitely was a 'toothed turkey' in it's
> lifestyle, but it certainly seems plausible.
> Cycads often have slanting/curved trunks -- particularly when massed
> together -- and a rough, often stepwise exterior that is easily negotiated
> by small animals w/ claws. The usual rosette at the top is a form that even
> a medium size dog or boy can "perch" in -- not in comfort perhaps, but w/out
> risk of falling.
> In fact, getting out of a cycad might be harder than getting up one -- hence
> the advantage of parachuting abilities.
> Heh. Some personal observations, there...
>> IMHO, the fossil evidence points to a "long-fuse" development of the
>> modern avian flight apparatus. Over a long period of time, and within
>> multiple lineages, paravians were engaged in aerial behavior that did
>> not qualify as true powered flight.
Robert J. Schenck
Kingsborough Community College
Physical Sciences Department
S332 ph# 718-368-5792
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