Here's a breakdown of the classification:
* Order: Primates
* Suborder: Haplorhini
* Infraorder: Simiiformes
* Parvorder: Catarrhini
* Superfamily: Hominoidea
* Family: Hylobatidae (Gibbons)
* Genus: *Hylobates* (for most gibbon species)
While they are called "lesser apes", it's important to note that this term is outdated and not necessarily accurate. Gibbons are highly specialized primates with unique adaptations and deserve to be recognized as their own distinct group.