I think you need to be more specific.
There are rare S Americans from the cool waters of Uruguay, but because they need cool fluctuating temps would not work with those from northern S America where water is constantly warm.
There are also those that come from west of the Andes and live in alkaline water that would not work with Amazonian type that prefer soft, acidic and tannin rich conditions.
Even those from the same clade can require vastly different water condition.
These A heckelli above, from northern S America prefer warm (80sF), somewhat soft water, conditions. But their close cousin G quilero (below) from Uruguay prefer a cool down into the 60sF or even lower.
same goes for some of the pike cichlids, even though they are from the same genus
The belly crawler above prefers warm water,
the Crenicichla from Uruguay below cooler waters
the distance between Manaus in Brazil to Montevideo in Uruguay is almost twice the distance between Miami Fl and Toronto Ontario.
