>> For those without access to the paper, like myself, what is their >> estimated mass for Q. northropi? 544 kg
For crying out loud.Anyway, the same issue has a paper on *Azendohsaurus*. The "prosauropod" from Madagascar is referred to it as a new species, and *Azendohsaurus* is neither an ornithischian nor a sauropodomorph. In fact, it's not an archosauriform at all. There's no trace of an antorbital fenestra, and the lateral temporal fenestra is still open ventrally!
This blog post has more information, including a skull reconstruction: http://blogs.smithsonianmag.com/dinosaur/2010/05/21/azendohsaurus-the-dinosaur-that-wasnt/