Captive mongoose lemurs, native to Madagascar. Image credit: Primate Center, Duke University.
Prosimians are typically, but not exclusively nocturnal, and have lower brain-to-body mass ratios than other primates. Their habitat is restricted to tropical woodlands.
Prosimians are characterized by:
• a well-developed sense of smell with snout
• only partial binocular vision
• claws on some digits
• immobilized upper lips
• a 2:1:3:3 dental formula, i.e., 2 incisors, 1 canine, 3 premolars, 3 molars.