Approximate worldwide distribution of monkeys.
<img src='http://upload.wikimedia.org/wikipedia/commons/2/25/Monkeysdistributionmap.gif' border='0' alt='user posted image' />
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About 40 million years ago the Simiiformes infraorder split into parvaorders Platyrrhini (New World monkeys - in South America) and Catarrhini (apes and Old World monkeys - in Africa).[2] <b>The Platyrrhini are currently conjectured to have migrated across the Atlantic Ocean to South America on a raft of vegetation similar to the vast pieces of floating Mangrove forest that storms occasionally break off from the tropical African coast. </b>At that time the Atlantic ocean was circa 4,500km wide.[citation needed]<!--QuoteEnd--><!--QuoteEEnd-->
<img src='http://upload.wikimedia.org/wikipedia/commons/2/25/Monkeysdistributionmap.gif' border='0' alt='user posted image' />
<!--QuoteBegin-->QUOTE<!--QuoteEBegin-->New_World_monkey
About 40 million years ago the Simiiformes infraorder split into parvaorders Platyrrhini (New World monkeys - in South America) and Catarrhini (apes and Old World monkeys - in Africa).[2] <b>The Platyrrhini are currently conjectured to have migrated across the Atlantic Ocean to South America on a raft of vegetation similar to the vast pieces of floating Mangrove forest that storms occasionally break off from the tropical African coast. </b>At that time the Atlantic ocean was circa 4,500km wide.[citation needed]<!--QuoteEnd--><!--QuoteEEnd-->