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     Recent research suggests that diplodocoids disappeared from Patagonia by the Coniacian, replaced by derived titanosaurs.  In light of this, and research by Curry Rogers indicating that Nemegtosaurus is a titanosaur, despite diplodocoid-like skull features, isn't it most likely that Antarctosaurus includes material from a diplodocoid-like titanosaur, rather than a true diplodocoid?