Yes. I'm sure there are other species of Nannoptopoma, that's a new species. All in all I think all of them are rare though.
Catfish.. yes, they are very boring. I love the things so I'm biased, but most of the joy of a catfish is simply from knowing it's somewhere in your tank hiding. A happy catfish is one you can't see! I don't even see my cories too often (never all at once) but people seem to have different luck with that. My cories just have too many hiding places and use them very well.