Re: Re: Abelisaur & Titanosaur migratory routes

[Thomas_R_HOLTZ@umail.umd.edu (th81)]

>In a message dated 96-01-24 09:39:38 EST, Thomas_R_HOLTZ@umail.umd.edu (th81)
>writes:
>
>>The titanosaurian nature of Atlantosaurus is subject to debate, to say the
>>least.  Furthermore, almost all the dinosaur bearing horizons of the
>>Morrison are now known to be Kimmeridgian (a recent development,
>>though, not widely reported yet).  However, Janenschia of the Tendaguru, IS
>>a Late Jurassic titanosaurian.
>
>_Janenschia_ and other early "titanosaurians" or "titanosauroideans" are
>probably andesaurids. One candidate for a Morrison titanosaurian might be
>_"Apatosaurus" minimus_, based on a small partial pelvis showing 6 sacral
>vertebrae and very low, laterally flaring ilia. It's a new genus for sure.

The monophyly of the "Andesauridae" has yet to be established, but they may
very well be a natural group.

Thomas R. Holtz, Jr.
Vertebrate Paleontologist
Dept. of Geology
University of Maryland
College Park, MD  20742
Email:Thomas_R_HOLTZ@umail.umd.edu (th81)
Fax: 301-314-9661
Phone:301-405-4084