[LazyPup]

That is definitely not plywood. When you examine plywood it will have multi-layers of thin veneers glued together so that the the alternating layers of grain are at right angles to each other.

The piece you have in the picture is milled from solid wood. It is difficult to identify the species of wood from the pictures but I would suggest you take the piece you have pictured in your hand to a local lumber supplier and they should be able to identify the species for you.

Also, If you plan on preserving the moldings you are taking off, do not pound the nails out from the backside as that will cause the finished face of the wood to splinter and split out. Instead, use a pair of pliers to pull the nail through the wood from the backside. That will prevent splitting. I have prepared an illustration in the Illustration forum.