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Re: Lemurs and Feathers (well, Arthropods, too!)



Late, late reply, this thing was sneaking around in subfolders
where I'd lost it, apparently.... ;)

Steve Brusatte (dinoland@lycos.com) had written:

<However, comparing the two [insects and birds] can give
interesting information and data. It is not correct in saying
that insect flight has nothing to do with avian flight. Both
lineages somehow conquered the air, modifying structures to
exploit a totally new environment. Of course, the structures are
not homologous, but definitely analogous. Birds and insects
basically did the same thing (evolve flight), so some
comparisions can be made, although additional study is
definitely needed.>

  Comparative only in the degree that both have powered flight,
as in bats, but this is only analogous as far as the aerodynamic
use the wings, as in flying fish, and powered flight, which is
by control to influence the relative aerodynamic form of the
wing through a cycle that propels the body forward (or down, or
wherever...). The methods, form of wing, and pattern of flight,
and even surface of the wing, are different between the two,
whereas bats are more similar to the birds in these conditions.
The osseous versus chitinous, vertebrate versus arthropod,
conditions present in these two groups suggests that _any_ data
to be collected from the organisms, outside of having conquered
the air, is to be held to these organisms themselves, and not
adapted to each other. Only analogies are in the nature of the
wing and the powered flight of locomotion.

=====
Jaime A. Headden

  Aaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhr-gen-ti-na
  Where the Wind Comes Sweeping Down the Pampas!!!!

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