Which primates are included among the prosimians? Why is this taxonomic group problematic?

The primates that are included among the prosimians are all the existing or extinct species of strepsirrhines. The taxonomic groups are problematic because they fail to mark specific distinctions between the species.

Explanation:

It is from 85 to 55 million years that the primates have been existing on the Earth. They emerged as small terrestrial animals and developed into some large ones through the continued evolution of species. Daubentoniidae, Tarsiidae, Lemuridae are some examples of primate families.