There are more than 260 species of Monkeys found in the world today. They are derived from early primates that have been around for millions of years. There isn’t enough information about evolution to say with certainty how they came to be.
Here is some information about them to help clarify the categories. You will also have information about how these two groups of Monkeys are the same.
Amazing photo gallery about monkeys. Rhesus Macaque Monkey Resting.
Amazing photo gallery about monkeys. Rhesus Macaque Monkey Sitting On A Tree.
Sharing 91% DNA similarities with humans is the Baboon. This particular Monkey is often argued to be an Ape instead. However, science has placed them into the area of being a Monkey based on a variety of contributing factors.