Primate phylogeny (test: phylogenic tree does have a temporal component) Tarsiers, nw monkeys, ow monkeys apes (hominoids = apes) Order 2 suborder 6 superfamilies- 11 families. The single trait that characterizes all primates, to the exclusion of all other mammals. Flat nails instead of claws (exception: marmosets and tamarins) Sensitive tactile pads with thin ridges on the tips of the digits. Loss of rhinarium (moist skin around nostrils) in haplorrhines. Reduction of snout length and nasal structures of the skull, especially in haplorrhines. Overlapping fields of view throughout most of our visual range. Anatomical changes in the primate brain have accompanied enhanced depth perception, lending primates the unique ability to interpret overlapping fields or view from each eye as a. Trichromatic color vision in apes, ow monkeys and some nw monkeys. Larger proportion of brain devoted to cognition, memory, association, etc. (not just sensory input) Learn from group mates: one reason for that long childhood.