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Re: Brontosaurus/Apatosaurus

> Does this actually mean what I think it means? That a juvenile sauropod
> has a different number of vertebrae than an adult?  How do you figure?

Of course not.  I said SACRAL vertebrae.  As dinosaurs get older (and 
bigger) more vertebrae are incorporated into the sacrum, recruited from the 
dorsal and/or caudal series.