found: Sakurai, A. Aquarium fish of the world, 1993:p. 98 (Angelfish; four species recognized at present: Pterophyllum scalare, P. leopoldi, P. dumerilii, P. altum)
found: Britannica Micro.:v.1, p. 401 (angelfishes, popular in home aquariums, are members of genus Pterophyllum and native to freshwaters of South America; also marine angelfishes)
found: Collier's encyc.:v. 2, p. 201 (angelfish: a name applied to a group of freshwater species, Pterophyllum, which live in South America, and a group of marine fishes)
found: Sandford, G. Tropical fish identifier, 1994:index (angelfish (freshwater) 58; angelfish (marine) 82-4)
found: Mills, D. Aquarium fish, 1993:index (Angelfishes: freshwater 122; marine 236)
found: Sterba, G. The aquarium encyc., 1983:p. 480 (Pterophyllum. Long finned-angelfishes. Genus of the Cichlidae. Synonym : Plataxoides)
found: Eschmeyer catalog genera fishes:p. 346 (Pterophyllum. Cichlidae)
found: Random House(angelfish: pl. -fish; esp. coll. -fishes: genus Pterophyllum, often kept in aquariums)
