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Re: [dinosaur] Latenivenatrix, new troodontid from Dinosaur Park Formation, Alberta (validity of Troodon)

> Actually, arguably not. Within Titanosauria there are several proposed and 
> employed "families" (Saltasauridae, Nemegtosauridae, Aeolosauridae, 
> potentially others). It is not at all certain which of these the Titanosaurus 
> indicus material would belong to. If we agreed to put all of these in one 
> family, that would be Titanosauridae. But if we regard them as distinct taxa, 
> and cannot affirm where Titanosaurus goes, we can continue to not use 
> "Titanosauridae".

Oops, that's true; if Titanosauridae is indistinguishable from two (or more) 
families that can be distinguished from each other, it is a nomen dubium. I 
hadn't been paying enough attention to titanosaur nomenclature over the last 
few years.