Clearly you didn't read the various papers that were in the link that I supplied.
Pfff like people are gonna read something
Clearly you didn't read the various papers that were in the link that I supplied.
Clearly you didn't read the various papers that were in the link that I supplied. If you had, you'd understand that one can no longer differentiate between some of the amphilophus species due to a couple of physical traits such as elongate body form or thick lips.
While the following paper no longer appears to be free, below is a link to the blog spot of one of the authors, who lives on the shoreline of Lake Apoyo.
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
http://lagunadeapoyo.blogspot.ca/2012/01/sympatric-speciation-demonstrated-among.html
From that paper .........
If as you say, "we can only really rely on the ideals based on the information before us", then you need to catch up to the most current information. The information that you are relying on is based on information from 30 yrs ago, from authors such as Paul Loiselle who through no fault of his own did not understand at that time how complex this genus was.
Also, there is no evidence to support that A. labiatus and A. citrinellus will, or ever have hybridized in the wild. In captivity, yes, but not in the wild.
Here's a link to Loiselle's article; http://www.cichlidae.com/article.php?id=106 where in 1982 he states:
Even 30 yrs ago it was clear that the trait of being "deeper bodied" is influenced by environmental considerations, and varies so markedly that it is not a reliable means of differentiating between these cichlids.
Also, the original collector of amphs in the crater lakes, George Barlow (who has openly admitted this in at least one of his papers written in the 1970's) was also confused by some of these amph species, and originally viewed all of them as one species, citrinellus.
So clearly these were not all "pure stock" as Loiselle suggested.
Loiselle even mentions this in the same article, where he states:
And as trace stated, even if ones amph does have mixed genes, doesn't mean it can't be a stunning fish worthy of one keeping in an aquarium.
The interesting difference in the Midas cichlids in the Great Lakes lies in the shift in color types away from red and pink toward gold. In April, 1971, I counted 1,175 fish in the Granada Market. Unfortunately, I believed at that time that c. citrinellum and C. labiatum were the same species. I have since established that the pink and red morphs in the Great Lakes are not C. citrinellum.