* Kingdom: Animalia (All animals)
* Phylum: Chordata (Animals with a backbone)
* Class: Mammalia (Animals with fur/hair, give live birth, and nurse their young)
* Order: Primates (A diverse group that includes monkeys, apes, lemurs, and tarsiers)
* Suborder: Haplorhini (Primates with dry noses and typically larger brains)
* Infraorder: Simiiformes (Monkeys and apes)
* Parvorder: Platyrrhini (New World Monkeys - found in Central and South America) OR Catarrhini (Old World Monkeys and Apes - found in Africa and Asia)
At this point, the category gets very specific, depending on the specific type of monkey:
* Family: This is where we start to differentiate between major groups of monkeys. Examples include:
* Cebidae: (Capuchin monkeys, squirrel monkeys)
* Atelidae: (Howler monkeys, spider monkeys)
* Cercopithecidae: (Old World Monkeys, including baboons, macaques, and vervet monkeys)
* Genus: This level further breaks down the family into specific groups. For example, within the family Cercopithecidae, there are genera like *Macaca* (macaques), *Papio* (baboons), and *Chlorocebus* (vervet monkeys).
* Species: This is the most specific level. For example, within the genus *Macaca*, there are species like *Macaca mulatta* (Rhesus macaque) and *Macaca fascicularis* (crab-eating macaque).
In summary: The hierarchical category for "monkey" can be quite broad (Animalia, Mammalia, Primates) or very specific, depending on the level of detail you need.