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Re: Air sacs in extant non-avian reptiles?
"Henri Rönkkö" wrote:
> I thank you for your reply, but I'm afraid there was a misunderstanding. I
> was talking about extant, in other words, modern, nowdays reptiles (non-avian
> ones). I have read that some of the both non-dinosaurian and non-avian
> reptiles that live among us today have air sacs attached to their lungs. The
> sources of mine are David Norman's book "Prehistoric life" and GSP's message
> to the DML; the latter critisized the theropod lung articles of Ruben's team.
> Now, I am pretty confident that the claims conserning the presence of
> pulmonary air-sacs in some of today's non-avian and non-dinosaurian reptiles
> is based on some real evidence. I would like to know the names of the animals.
> And as we all know, air circulates unidirectionally in the avian pulmonary
> complex. Today's non-avian and non-dinosaurian reptiles, as well as mammals,
> in turn, have inefficient "dead-end" lungs. I was wondering, what possible
> use could today's non-avian and non-dinosaurian reptiles possessing pulmonary
> air sacs have for these air sacs, and asking anyone possessing the
> information to reply me.
Perhaps you are thinking of the non-vascularised portion of the snake
lung? I believe
this is essentially a reservoir of air, not in any way homologous to