Fossil Friday!

This week on the Fossil Friday, I bring you a fossil that might be a little too easy! No, it's not a sloth, but it is a relative of an animal many of you might actually have sitting at your feet right now. I won't give anything else away, but I'll demand many answers from you: What was this creature? Where did it live? What epoch did it live in?

The first person to identify this animal from this fragment of fossil wins bragging rights for the week.