Amphilophus


Amphilophus is a genus of cichlid fishes from Central America, ranging from southern Mexico to Panama. The genus currently contains 23 species, including several that are well-known from the aquarium trade. However, studies led by Oldrich Říčan in 2008 and 2016 suggested that several species within Amphilophus should be moved to the genus Astatheros. Species proposed to be moved to Astatheros in 2008 were A. alfari, A. altifrons, A. bussingi, A. diquis, A. longimanus, A. macracanthus, A. margaritifer, A. rhytisma, A. robertsoni and A. rostratus. Further genetic studies led Říčan to put A. macracanthus in Astatheros, but to put A. alfari, A. altifrons, A. bussingi, A. diquis, A. longimanus, A. rhytisma, A. robertsoni and A. rostratus within the genus Cribroheros. Říčan's study suggests that the Astatheros species are more closely related to the Jack Dempsey and rainbow cichlid than to the remaining Amphilophus species.
Several species from this genus are endemic to the small Lake Apoyo and Lake Xiloá in Nicaragua, and are believed to be the result of sympatric speciation.

Species

According to FishBase, there are currently 16 recognized species in this genus, listed below. According to Catalog of Fishes, "Cichlasoma" istlanum and "Cichlasoma" trimaculatum also belong in Amphilophus, Amphilophus erythraeus is a valid species, and Amphilophus margaritifer is an invalid species.