I'm amazed at how many times the naming of a new genus or species ends up as a complete balls-up. _Futalognkosaurus_ is just one of a long line of nomenclatural disasters. We also have _Aberratiodontus_, _Gigantspinosaurus_, _Angulomastacator_, _Confuciusornis_, _Minotaurasaurus_, and so on. And that's just the genera.
To be fair, *Angulomastacator* is actually defensible from the original Greek. (Unless the Greek in that paper contains a mistake -- I don't know Greek.)