"Hominoidea contains two families of living (extant) species:
Hylobatidae consists of five 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.[1][2] Alternatively, the hominidae family are collectively described as the great apes.[3][4][5][6] There are two extant species in the orangutan genus (Pongo), two species in the gorilla genus, and a single extant species Homo sapiens in the human genus (Homo). Chimpanzees and bonobos are closely related to each other and they represent the two species in the genus Pan."
http://en.wikipedia.org/wiki/Ape