Hey man. I am a big fan of Geo. Surinamensis but unfortunately they are very difficult to find locally. It is not easy to get any species from the Suriname period. But it seems to often be mistaken with the Geo. Altifrons which is a beautiful species of geo and much easier to find locally or online. The problem with picking out Geo species is that there are so many different types that they often get confused with one another. Some species also appear to be very similar to others. I am starting to become a geo enthusiast and in addition to my pair of altifrons, I have just picked up two species which I have yet to identify.
Goodluck
Larry