Amphilophus is a genus of cichlid fishes from Central America. The genus currently contains 23 species. However, a 2008 study led by Oldrich Rican suggested that several species within Amphilophus should be moved to the genus Astatheros. Species proposed to be moved to Astatheros are A. alfari, A. altifrons, A. bussingi, A. diquis, A. longimanus, A. macracanthus (which would be the type species for Astatheros), A. margaritifer, A. rhytisma, A. robertsoni and A. rostratus. Rican's study suggests that the Astatheros species are more closely related to the Jack Dempsey and Rainbow Cichlid than to the remaining Amphilophus species.