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.

• 98057pr0001 Animal Body Part, Dinosaur, Tyrannosaurus Rex Lower Jaw with Tan Teeth Print Print of this part
• 98057pr0003 Animal Body Part, Dinosaur, Tyrannosaurus Rex Lower Jaw with White Teeth Print Print of this part
• 98161pr0015 Animal Body Part, Dinosaur, Tyrannosaurus Rex Head with Pin with Tan Teeth, Sand Blue Markings Print Pair of this part
• 98161pr0091 Animal Body Part, Dinosaur, Tyrannosaurus Rex Head with Pin, Light Bluish Grey Teeth, Tan Markings, Dark Brown Stripes Print Pair of this part