This is a mount that stands on display in the Carnegie and has no name attached to it. The reason is quite simple – the specimen has yet to be formally described. The consensus is that is a new taxon and will be getting a name in due course. However, having not actually seen the original material (well, beyond a few bits) I don’t know how complete this is or which bits of the mount are reconstructed (though I’d guess the skull is all sculpted).
Oddly enough, I saw this (or perhaps a duplicate) in Japan a few years ago as part of a touring exhibit. I’d wondered what it was then as I didn’t know which taxon it belonged to, only of course to later discover it hadn’t been named. It does hinder your ability to diagnose something when it’s not actually in the literature.