> Sonidosaurus is the Iren Dabasu sauropod.
It's mentioned in the paper or the supplementary information and said to be small for a sauropod, but still slightly bigger than *Gigantoraptor*.
Yep, it's mentioned in the Supp Info. What threw me is that the original description of _Sonidosaurus_ mentions that it comes from the Erlian Formation, not the Iren Dabasu Formation.