There are eight categories(genus) in the ape or Hominoidea super family. These are usually split into two categories, the lesser apes and the great apes.
Monkeys are not considered apes as they are primates in the super family of Cercopithecoidea.
Most Endangered Types of Primates
It's estimated that 25% of the 625 species of primates are endangered. According to a report, released 26 April 2005, by the Primate Specialist Group of IUCN-The World Conservation Union's Species Survival Commission (SSC) and the International Primatological Society (IPS), in collaboration with Conservation International (CI).
Africa
- Galagoides rondoensis - Rondo dwarf galago
- Procolobus pennantii pennantii - Pennant's red colobus
- Procolobus rufomitratus - Tana River red colobus
- Procolobus badius waldroni - Miss Waldron's red colobus
- Rungwecebus kipunji - Highland mangabey
- Cercopithecus diana roloway - Roloway monkey
- Gorilla gorilla diehli - Cross River gorilla
Asia
- Tarsius sp. - Siau Island tarsier
- Loris lydekkerianus nycticeboides - Horton Plains slender loris
- Simias concolor - Pig-tailed langur
- Trachypithecus delacouri - Delacour's langur
- Trachypithecus p. poliocephalus - Tonkin hooded black langur
- Semnopithecus vetulus nestor - Western purple-faced langur
- Pygathrix nemaeus cinerea - Grey-shanked douc
- Rhinopithecus avunculus - Tonkin snub-nosed monkey
- Nomascus nasutus hainanus - Hainan black-crested gibbon
- Hoolock hoolock hoolock - Western hoolock gibbon
- Pongo abelii - Sumatran orangutan
Madagascar
- Prolemur simus - Greater bamboo lemur
- Eulemur albocollaris - White-collared lemur
- Propithecus candidus - Silky sifaka
- Lepilemur sahamalazensis - Sahamalaza Peninsula sportive lemur
Neotropics
Ateles hybridus - Variegated spider monkey
Ateles fusciceps - Brown-headed spider monkey
Oreonax flavicauda - Yellow-tailed woolly monkey
Source: IUCN/SSC Primate Specialist Group
Types of Apes