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At 11:49 AM 6/12/98 -0700, Betty Cunningham wrote:
>Does this actually mean what I think it means? That a juvenile
>sauropod has a different number of vertebrae than an adult?
Almost. It has a different number of *sacral* vertebrae (that is, the ones
that are fused with the pelvis). The total count may well be the same.
> How do you figure?
What often happens is that posterior dorsals and/or anterior caudals get
recruited into the sacrum as the animal grows. This is more or less a case
of development recapitulating phylogeny.
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