Dichotomous Key/Primates

Dichotomous Key

Primates
Kingdom	Animalia
Phylum	Chordata
Subphylum	Vertebrata
Class	Mammalia
Subclass	Placentalia
Order	Primates

Parent key: Mammalia
Subclasses
Marsupialia - Monotremata - Placentalia
Key: Mammalia
Orders
Afrosoricida - Artiodactyla - Carnivora - Cetacea - Chiroptera - Dermoptera - Insectivora - Lagomorpha - Macroselidae - Marsupialia - Monotremata - Perissodactyla - Pholidota - Primates - Proboscidea - Rodentia - Scandentia - Sirenia - Xenarthra

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