Thats the same here with all old school fronnies, they are just called frontosa. Then again, breeding fish against each other since the 70's. That is over 30 years of breeding against the same lines. Explain the odd 7 bar, variance of colour, they aren't as high bodied....Australia is a prime example of now poor quailty Cichlid species. Americans especially, nowhere near as nice & as colourful as they were 10 to 20 years ago.
People have other theories,{I used to be one, but could never source proof} funnily enough those others that follow some theories can't prove them either.
eg; Surely other fronnies were exported. Fish exporation was limited Lake Tangy in the old days with civil wars, technology, alligators, hippos.... fronnies also live in deeper water so the catching them & getting to the surface without killing them used to be a problem.
eg;People could of mixed variants once new ones were sourced. Possible, but remember that when new variants were sourced & then exported{many years later} they came with a very hefty price tag. Mostly it was just the fanatics, people in the know...jumped on them. They would sell them on with proper name too.
Frenchy