What classification separates tamarins geographically and evolutionarily from their Old World relatives?
Answer
New World monkeys
Tamarins are distinctly classified as New World monkeys, which differentiates them from their Old World relatives found in Africa and Asia.

Related Questions
In which two continents are tamarins naturally distributed?What classification separates tamarins geographically and evolutionarily from their Old World relatives?Which family classification do tamarins share with marmosets?The Golden Lion Tamarin is exclusively found in which specific biome region of Brazil?What is the native home country of the Cotton-top Tamarin?Why are endemic tamarins exceptionally vulnerable to localized threats?The Black-faced Lion Tamarin inhabits coastal Atlantic rainforest near the border region of which two Brazilian states?How does the general distribution of marmosets compare to tamarins regarding southern extent?What habitat context is generally associated with the Cotton-top Tamarin's origin?What modern factor complicates the simple question of where the Golden Lion Tamarin originates today?