I guess this one was discussed elsewhere, too. If you find a definitive answer, let us know! For the time being, I'd treat it like I would a Philo bipinnitifidum/selloum.

It is a Philodendron for sure.

could be the spit leaf one, maybe as it gets older the leaves will get more definately "split"- I agree with ooojen, philo selloum, a young one. I had one of these but left it with an ex, it wasn't looking too good or I would have taken it - wouldn't you know that it recovered and is now gorgeous!!!

Easy plant, bright light but doesn't need direct sun, needs alot of room to stretch out, it will get big! Don't overwater. Will send out roots into the air, don't cut them off, if you don't like the way they look, bend them so you can push them back into the soil. This is a cool plant, I would definately buy another one!

Split leaf "philodendrons" are not Philodendrons. They are Monstera deliciosas.

Split leaf philodendron are Philodendron selloum. Swiss Cheese plants are Monstera deliciosa. ;-)