I still believe that they are natural hybrids. Managuense and fredrichsthali. We collected them in one particular area of the Rio Danto...but that particular area has many back tributaries...so likely it is elsewhere. The original collection point I believe has since dried up...literally. Great looking fish. I still have an F0 breeding pair...the male is a easily 14"...way to big for a Freddie.
I tend to agree with the natural hybrid theory. These IMO are my favorite parachromis. Sadly i lost the female and the male went depressed and i got rid of him luckily i have some fry for a future pair.