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Re: Alvarezsaur spurs (was Re: dino-lice)



2011/4/20 Augusto Haro <augustoharo@gmail.com>:
>>
> Great viewpoint, analyzing morphology in the dynamics of ontogeny.
> ...it may be that young alvarezsaurs
> fixed this way to the adults of their species.
>
Or that insect-eating was used by young alvarezsaurs with
(purportedly) proportionally larger limbs, and after surpassing the
threshold of 1 kg. indicated by Tim, changed to other feeding habits,
with the previously important forelimb becoming reduced, even if
maintaining the morphology it had in the young.