RE: Biogeographic origin of Diplodocidae

[Adam Yates <A.Yates@zoo.latrobe.edu.au>]

   <Is Apatosaurus actually considered a Diplodicid ATT?  I've heard
arguments both ways.>

I think the case for the placement Of Apatosaurus in Diplodicidae s.s. is
fairly solid,perhaps the most persuasive of characters that unite
Apatosaurus with Diplodicus to the exclusion of Dicraeosaurus, is the
increase in the number of cervical vertebrae at the expense of the trunk
vertebrae.   


   Speaking of saurapods, is there anything recent on Argentenosaurus?

Not as far as I know. I think its remains still consist of the rather
incomplete material included in the original description, however given the
rate that discoveries seem to be made in South America, I wouldn't be too
suprised if some new material will turn up (or already has). Lets hope!

cheers
Adam Yates