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Re: Tubinates & Nano T.
Mark Sumner writes;
>What literature I have seen on this feature to date suggests that these
>features indicate that Nano was an olfactory hunter. But shouldn't the
>existance of these structures in this small member of the
>tyrannosaurids, and their absence in larger members, indicate a possible
>vote for the "hybrid" metabolism theory?
Not necessarily. The "suped-up nose" could actually be seen as a factor of
survival, than a factor of metabolism. See below.
>Larger tyrannids might have been able to accept outside air without
>conditioning, counting on sheer bulk to minimize any heat losses. Nano,
>with considerably less mass, may have been more sensitive to such
>losses and may have had a more actively regulated body temperature.
Actually, the folding in Nano's olfactory region could simply provide more
surface area for the olfactory organ. As a result, Nano's sense of smell would
be much more acute than a proportionally sized Rex. In a way, we could expect
this type of structure to evolve: assuming that Nano lived in the same
environment as something from the tyrannosaur family, then a smaller hunter,
like Nano, would've had to develop some kind of feature that would give it an
advantage over it's larger contemporaries. Having a better sence of smell
would've meant that they could smell a meal from a much larger distance. I
envision Nano occupying a coyote-like niche.
The comments on body temperature does seem to describe Nano as having a more
active metabolism than Rex. However, this doesn't mean that Rex had to be an
ectotherm, simply that Nano's metabolism was more active.
>All right, so now everyone can tell me it's been covered everywhere and
>I'm simply ignorant.
What's ignorant mean;-)
"No one expects the Spanish Inquisition!"