Re: Re: diplodocid radiation

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

>more primitive (Euhelopodid like) snout. Until a good Titanosaurid skull
>is found we can't be sure that the entirely cranial synapomorphies of 
>Upchurch's Diplodicoidea aren't infact  apomorphies of the larger 
>Titanosauroidea + Diplodicoidea clade. BTW is the Titanosauria the 
>valid name for this larger clade?

Unfortunately, "Titanosauria" is already in use by Argentine paleontologists
for the Andesauridae-Titanosauridae clade.  Thus, using Upchurch's
phylogeny, Titanosauria is a subset of Titanosauroidea.
 

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