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> I like the idea that the single-clawed forelimbs of alvarezsaurs were
> used to penetrate carcasses (especially from the inside), or that they
> were used to prise parasites off hides - either from the hides of
> other species, or from each other (as a grooming tool). Thus
> returning us to the origin of this thread: Dino-lice.
Those functions do not explain the limb shortening trend in the group.
Both jobs could be accomplished better with unmodified, primitive, arms.
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