Apes (Topical Term)

Wikipedia, Jan. 7, 2014 (Apes are Old World anthropoid mammals, more specifically a clade of tailless catarrhine primates, belonging to the biological superfamily Hominoidea. Hominoidea contains two families of living (extant) species: Hylobatidae consists of four genera and sixteen species of gibbon, including the lar gibbon and the siamang. They are commonly referred to as lesser apes. Hominidae consists of orangutans, gorillas, chimpanzees, bonobos and humans. Alternatively, the hominidae family are collectively described as the great apes.)

ITIS, Jan. 7, 2014 (Family Hylobatidae, genus Hylobates; Family Hominidae - man-like primates, genus Gorilla, genus Homo, genus Pan, genus Pongo)

Mammal species of the world, via Smithsonian National Museum of Natural History website, Jan. 7, 2014 (under Superfamily Hominoidea: Family Hylobatidae, genera Bunopithecus, Hylobates, Nomascus, Symphalangus; Family Hominidae, genera Gorilla, Homo, Pan, Pongo)