Short of DNA work, who can ever say with 100% certainty? The entire midas complex in Central America is a work in progress.
https://www.monsterfishkeepers.com/...ellus-a-potential-case-of-f1-midevils.439705/
In the following paper (2010), Jeffrey McCrary et al go so far as to state that one should only assign taxonomically valid species names to unambiguously identifiable individuals and not to each phenotype that is similar due to only one character, i.e. elongate body form or thick lips
Not a simple case A first comprehensive phylogenetic hypothesis for the Midas cichlid complex in Nicaragua (Teleostei: Cichlidae: Amphilophus)
Matthias F. Geiger, Jeffrey K. McCrary, Ulrich K. Schliewen
Cit or lab, who cares, smokin' hot Amph! lol