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Luis Rey wrote:
<<I haven't seen any mention on the fact that dinosaurs like Shunosaurus,
Omeisaurus and possibly Mamenchisaurus had tail clubs. This is the definitive
proof that sauropods used their tails defensively and offensively. I still
find the cracking sound of and Apatosaurus tail rather irresistible (at least
as a theory).>>

It should be noted, however, that this fact is in grave doubt.  After having
spoken to Paul Upchurch at SVP, he informed me that he was doubtful that any
sauropods besides _Shunosaurus_ had tail clubs.

The reason that Dong had claimed that _Omeisaurus_ had one, is because the
Dashanpu (Xiashaximiao frm) yields two sizes of tail clubs, one small size
which he claims must belong to _Shunosaurus_ (this is true because they have
actually been found attched to _Shunosaurus_ tails), and the larger size which
must belong to something bigger: _Omeisaurus_.  The problem is that no
_Omeisaurus_ has ever been found with a tail club, and there are some
individuals of _Shunosaurus_ that are big enough to have a tail club that big.

Additionally, I don't think that any tail clubs have been found in the
Shangshaximiao frm (which lies directly above the Xiashaximiao).
_Shunosaurus_ is absent from that formation, but _Omeisaurus_ and
_Mamenchisaurus_ are present.

Thusly....  It seems that _Shunosaurus_ is the only known sauropod with a tail
club.  Additionally, the tail club character uniting
_Euhelopus_-_Omeisaurus_-_Mamenchisaurus_ with _Shunosaurus_ in a monophyletic
Euhelopodidae is in doubt, indicating that this family may be paraphyletic,
which in any case, would jive better with most people's cladograms.

Peter Buchholz

No, Jay Leno's chin is big-boned, you are a big fat ass.