Just want to make you aware of this recent, very interesting work:
Colour forms of Amazonian cichlid fish represent reproductively
isolated species
J. S. READY, I. SAMPAIO, H. SCHNEIDER, C. VINSON, T. DOS SANTOS & G. F. TURNER
Their work indicates that several geographical populations / colour forms of A. caetei should be considered as biological isolated species.
"If future studies confirm that this result is indicative of a general trend, the species richness of the" Apistogramma "may presently be seriously underestimated." (Ready, J.S. et al., 2006)!
Colour forms of Amazonian cichlid fish represent reproductively
isolated species
J. S. READY, I. SAMPAIO, H. SCHNEIDER, C. VINSON, T. DOS SANTOS & G. F. TURNER
Their work indicates that several geographical populations / colour forms of A. caetei should be considered as biological isolated species.
"If future studies confirm that this result is indicative of a general trend, the species richness of the" Apistogramma "may presently be seriously underestimated." (Ready, J.S. et al., 2006)!