RE: Biogeographic origin of Diplodocidae

["Stewart, Dwight" <Dwight.Stewart@VLSI.com>]

   Is Apatosaurus actually considered a Diplodicid ATT?  I've heard
arguments both ways.  
   Speaking of saurapods, is there anything recent on Argentenosaurus?

Dwight
        -----Original Message-----
        From:   Adam Yates [SMTP:A.Yates@zoo.latrobe.edu.au]
        Sent:   Thursday, September 17, 1998 9:08 PM
        To:     'Dinogeorge@aol.com'
        Cc:     'dinosaur@usc.edu '
        Subject:        RE: Biogeographic origin of Diplodocidae

         

        -----Original Message-----


        << Also, the Tendaguru "Barosaurus" material does demonstrate that
Late
         Jurassic diplodocids were present in Gondwana. >>

        <I think this is all now referable to _Tornieria_, not
_Barosaurus_.>

        Yes the species originally called Gigantosaurus africanus is the
type
        species of Tornieria. However it is certainly a true Diplodicid (a
member of
        the clade that connects Apatosaurus to Diplodicus to the exclusion
of
        Dicraeosaurus)so Tom's original point still stands. Are there any
        apomorphies that might indicate that Torneria and Barosaurus could
be
        synonyms?

        Cheers

        Adam Yates