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Re: Quaesitosaurus and Nemegtosaurus
In reply to George Olshevsky.
> Not in the least. This was first suggested by Greg Paul several years ago.
> Initially, other workers tended to disagree, because the postcranial skeleton
> of _O._ has many features found among camarasaurids, whereas the skulls of
> _N._ and _Q._ seemed to be diplodocoid. A recent reconstruction of the skull
> of _N._, however, suggests close affinities with brachiosaurids, therefore
> also camarasaurids, whereas Upchurch's cladistic study places _N._ and _Q._
> in their own family, Nemegtosauridae, as a basal sister group to diplodocids.
It's worth noting that Upchurch's cladistic analysis regarded
_Opisthocoelicaudia_ not as camarasaur or even a diplodocoid, but as
a titanosaur. The postcranial skeleton of _O._ has a close OVERALL
similarity to camarasaurids, but when it comes down to the nitty-
gritty, there's not too many synapomorphies linking the two together.
More importantly, I heard a report somewhere that diplodocid-like
postcranial material was unearthed in the Nemegt Basin. So, I'm
prepared to leave _N._ disembodied for the time being (and _O._
without a head).