Apes are a group of primates that are further divided into two families:

Hominidae (Great Apes):

* Humans (Homo sapiens)

* Chimpanzees (Pan troglodytes)

* Bonobos (Pan paniscus)

* Gorillas (Gorilla gorilla)

* Orangutans (Pongo pygmaeus)

Hylobatidae (Lesser Apes):

* Gibbons (Hylobates spp.)

* Siamangs (Symphalangus syndactylus)

It's important to note that monkeys are not classified as apes. While both are primates, apes are distinguished by a lack of a tail, a more complex brain, and certain skeletal adaptations.