Before I bought some I tried to do some research on them too and found very little information. They are commonly known as Bandit Cichlid or Panda Cichlid.
I did buy 2 from my LFS that formed a pair and bred a few times. Unfortunately, the female turned on the male and harrased until I removed him to a separate tank (maybe she wanted revenge for him eating all their fry everytime they bred!). My LFS had 3 more that I bought and I now have them in the same tank as my unruly female. I'm not sure what will come out of it.
They seem to about as unaggressive as any cichlid I've ever kept. They do well in my 120g community tank. They eat well and seem to be more of a cruising species and are about swimming alot. They only get 3-5inchs so I think they could be kept in a smaller set-up.
Well they aren't geayi or cuyunii, becuase they have the midlateral spot. And they aren't oelemariensis because they have the midlateral bar. Since it has the black lappet, it shouldn't be sphenozona.
That leaves either owroewefi (if the spot is on the lateral line) or stergiosi: aka Rio Caroni (if the lateral spot is below the lateral line). I can't quite tell where it is on my tiny laptop screen. I looks like the lateral line goes through the top of the spot, which if it does I would say you have Guianacara owroewefi.
The upper lateral line is where Paul has drawn it, the continuation of it is centrally located towards the caudal fin, consider it staggered - the second starting below that of the first about 3/4 the way along the body. This trait is one of many that helps define Cichlids (although it is not always the case). Just FYI.