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Re: More tyrant Q & A's
Thomas R. Holtz, Jr.
<However, is there experimental proof suggesting that 20% is
necessary and sufficient? >
<Not that I am arguing that Stan and Sue are different taxa: I think the
that they are two individuals of the same species (_T. rex_) is very
I second that opinion.
What about subspecies? Some recent big mammal subspecies vary significantly
in size (Loxodonta). Even the members of the same species can vary in size
quite a lot. Mammuthus primigenius averaged in height 3,5 meters, though
individuals over 4 meters are not rare (some fragmentary fossils indicate
mammoths over 5 meters height!).
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