
09-06-2008
The two groups are quite different biologically.
Old World monkeys
cattarhine i.e the nostrils face downwards.
they have eight premolars
the tail is not prehensile
they are medium to large sized primates
New World monkeys
platyrrhine i.e the nostrils face sideways
they have twelve premolars
the tail is prehensile
they are small to medium sized primates
Jimmy and Hornbill you are correct in the definition of old world and new world.
Last edited by bongorob; 09-06-2008 at 02:45 AM.
Reason: last line missing
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