Dinosaur track

The dinosaur track is a standalone fossil in the introduced in  that appears in all subsequent games.

In
After donating the fossil in, its plaque in the museum will read:

"Unlike other fossils, fossilized foot-prints give us a glimpse of how the creature in question actually lived. Thanks to modern science, we can determine quite a lot about the particular gaits of some creatures. This includes how they supported their weight, their posture when walking, and even walking speed."