This may be too late to be of interest, but here goes:
I have one pair of wild caught A. rhytisma Rio Lari. My understanding is there may be few or none left from a practical vantage. Mine may be pair bonded but hard to tell. They were part of a trio in a 75 gallon for some months until trouble broke out. I tried to keep the remaining female with him for several more months 'till the surviving female started to show some raggedyness. I was heartbroken over the first loss and decided to seperate them and open a bigger tank, which has taken me until this week to do. I had taken pictures of the beautiful 7" male previously but they were unflattering. They aren't hard to photo but I was frustrated. The females are less impressive. I believe the gentleman was correct to treat them as one might geophagus beings they are substratum sifters. Along with C. godmani, this has been one VERY difficult animal to breed. Happily, last month I finally had free-swimmers on the godmani (and a very probable trio) after almost three years of attempting. I'm praying to God I can get similar results from my rhytisma after about the same length of time. I probably could have done so quite a bit earlier had I not so many different species to manage (in different tanks naturally). Oh well. Live and learn. This month I'll try to re-photo the male and get pics of the female too. Rhytisma are beautiful, highly colorful cichlids when properly cared for.