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.

• 98059pr0001 Animal Body Part, Dinosaur, Tyrannosaurus Rex Arm / Leg, Right, Small, Tan Claws Print Print of this part
• 98059pr0003 Animal Body Part, Dinosaur, Tyrannosaurus Rex Arm / Leg, Right, Small, Black Claws Print Print of this part
• 98059pr0007 Animal Body Part, Dinosaur, Tyrannosaurus Rex Arm / Leg, Right, Small, Dark Brown Claws Print Print of this part
• 98058 Animal Body Part, Dinosaur, Tyrannosaurus Rex Arm / Leg, Left, Small [Plain] this part is a pair of it
• 98160pr0015 Animal Body Part, Dinosaur, Tyrannosaurus Rex Body with Tan Belly, Sand Blue Markings Print Pair of this part