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Old World Monkeys
Infraorder: Catarrhini

Characteristics
 
1)  sit on rumps, not haunches
2)  larger
3)  sexual dimorphism
4)  fully bony eye socket
5)  2:1:2:3 dentition
6)  bilophodont molars
7)  estrus swellings
8)  big brains relative to body size

I.  Cercopithicids
    a. terrestrial
    b. cheek pouches
        1. to gather food, store it and run back up the tree
    c. big canines

II. Colobids
    a. leaf-eating
    b. arboreal
    c. sacculated stomachs