Prosimians are the most ancestral extant
primates; they represent forms that were ancestral to
monkeys,
apes and
humans. Prosimians are the only primates native to
Madagascar, and are also found in Southeast
Asia. With the exception of the
tarsiers, all of the prosimians are in the
suborder Strepsirrhini. Due to this reason the classification is not phylogenetically 'valid', as they do not share a unique last common ancestor, and anatomical traits.
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(Prosimii): The suborder of Primates including Lemurs, Lorises and Tarsiers.