The dentary was deep. However, as in prosauropods, it became lower towards the tip of the snout, while in sauropods the dentary became deeper, forming a very deep symphysis. In lateral view, the dentary shows a prominent ridge running diagonally across the bone. Apart from "Chinshakiangosaurus", this feature is only known from prosauropods, where it is interpreted as the insertion point of a fleshy cheek. Such cheeks would have prohibited food falling out of the mouth and may be a hint that the food underwent some degree of oral processing before it was swallowed. If "Chinshakiangosaurus" indeed was a basal sauropod, this would be the first evidence of cheeks in this group. In all other sauropods known from congruous remains this feature had been reduced already.