Re: titanosaurs

[David Marjanovic <david.marjanovic@gmx.at>]

> [...] the monophyly of a Euhelopodid
> has been seriously questioned and only a Mamenchisauridae seems to be as
> seriously considered by sauropod specialists today, given work reflecting
> a basal titanosauriform position for *Euhelopus* found by Wilson and
> Sereno (1998).

Somphospondyli is united by the namegiving spongy vertebrae the distribution 
of which has been miscoded by Wilson & Sereno, according to Wedel's big Acta 
Pal. Pol. paper on *Sauroposeidon* which is available for free here:

http://www.snomnh.ou.edu/pdf/2000/00-28.pdf