I've seen it sold as Swiss-cheese Philodendron, but I believe it is some species of Monstera.
It does look a lot like Monstera - but so small. I wonder if it would stay small in a terrarium or get overgrown.
I think it would not be worth the trouble to have to cut it back so much, and it would probably out-compete everything else in the jar. Besides, when they get big, that's when they're really magnificent :)
Let's hear it!