Dichotomous Key/Primates

1

 * Nose
 * Wet - 2
 * Dry - 3

3: Haplorrhini

 * Tarsus
 * Elongated - ../Tarsiiformes/
 * Not elongated - 4

4: Simiiformes

 * Nostril direction
 * Downward - 5
 * Sideways - 6

5: Catarrhini

 * Number of cusps on molars
 * Four - ../Cercopithecoidea/
 * Five - ../Hominoidea/

6: Platyrrhini

 * External ears
 * Very small - ../Nyctipithecidae/
 * Other - Could be ../Pitheciidae/, ../Atelidae/ or ../Cebidae/