BrittanichthysBrittanichthys is a genus of freshwater ray-finned fishes belonging to the family Acestrorhamphidae, the American tetras. The fishes in this genus are endemic to the Rio Negro basin in South America.SpeciesBrittanichthys contains te following valid species: Brittanichthys axelrodi Géry, 1965 Brittanichthys myersi Géry, 1965EtymologyThe genus Brittanichthys is named in honor of ichthyologist Martin [Ralph Brittan], Sacramento State College, California, who discovered both species. The specific name of B. axelrodi honors pet-book publisher Herbert R. Axelrod, whose T.F.H. Fund sponsored the expedition that collected the type specimen. The specific name of B. myersi honors the Stanford University ichthyologist George S. Myers, "a long-time student of South American fishes".