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Re: Venom in Sinornithosaurus
--- On Wed, 12/23/09, Augusto Haro <firstname.lastname@example.org> wrote:
> Anyway, I think that if we consider
> dubious whether the roots are
> exposed or not, I suppose CT scanning may help settling the
> (whether or not the alveoli are partially empty, as most
> suppose). It
> may lead to some short communication I guess, perhaps
> including a
> reestudy of the presumed recess for the gland, which has
> considered by some as an artifact...
> Perhaps somebody may be arranging things to do this by
I donât claim the following has any scientific bearing on the paper under
discussion, except perhaps to underline the extraordinary nature of claims of a
venom system in an animal of this bodystyle.
Assuming bipedal bodystyles can be shown in general to be associated w/
cursorial lifestyles; and that predatory envenomation strategies, and the
presence of venom in vertebrates generally, is associated with slowness of
locomotion* -- It is not obvious what combination of lifestyle and environment
would be likely to elicit cursorial locomotion and a venom system in a predator
simultaneously. It also seems intuitively unlikely that a fit cursorial
predator would evolve an effective venom system, at least not w/out some loss
of locomotive fitness.
General questions: We know that dinosaurs are basally bipedal, and that
herbivorous dinosaur lifestyles are associated w/ massive bodysize**; were
there any slow carnivorous dinosaurs that could be assumed to prey on small
animals, and therefore serve as logical candidates to evolve a predacious venom
system? What incremental evo-scenario resulting in a venom system is possible
when the prey animals are volant and must therefore die almost instantly to
convey any advantage to the predator?
*corrections to basic assumptions appreciated.
**and therefore a high inherent resistance to venoms generally, excepting
perhaps hypothetical bacterial symbionts...