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Re: Air sacs in extant non-avian reptiles?

Eric Lurio wrote:

<Okay, can you tell me ONE professional ornthologist
who belives that birds are currently reptiles? Not
aknowleging the possibility of dinosaur ancestry, but
currently having the same characteristics as lizards,
snakes and turtles.>

  Whoa, sheesh ... Ornithology is a specialty, focus
on birds as a single, whereas paleoornithologists are
more concerned with the general evolution as a whole.
Doesn't mean that "regular" ornithologists haven'
tackled the question. So, okay: Joel Cracraft, Luis
Chiappe, Gareth Dyke, Alfred Romer has looked at it,
Gerhard Heilmann (not an ornithologist, but wrote one
of the most eminent texts on the matter of
*Archaeopteryx*) understood they were reptiles. This
is during the clarification of what Reptilia was
comprised of.

  And only recently have turtles been considered
diapsids or even archosaurs (see Tom Holtz's post)
inclusive of intensive anatomical, evolutionary
analyses (see deBraga and Rieppel, 1997; and Lee,
1995, 1997, 1998).

Jaime "James" A. Headden

  Dinosaurs are horrible, terrible creatures! Even the
  fluffy ones, the snuggle-up-at-night-with ones. You think
  they're fun and sweet, but watch out for that stray tail
  spike! Down, gaston, down, boy! No, not on top of Momma!

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