Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 98057pr0003 Animal Body Part, Dinosaur, Tyrannosaurus Rex Lower Jaw with White Teeth Print Pair of this part
• 98160pr0004 Animal Body Part, Dinosaur, Tyrannosaurus Rex Body with Dark Tan Top, Reddish Brown Pattern Print Pair of this part