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.

• 98058 Animal Body Part, Dinosaur, Tyrannosaurus Rex Arm / Leg, Left, Small [Plain] this part is a print of it
• 98160pr0007 Animal Body Part, Dinosaur, Tyrannosaurus Rex Body with Dark Bluish Gray Top with Dark Brown Stripes Print Pair of this part