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When did the first fully recognizable primates appear in the fossil record?

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Illustration comparing the body plans of representative anthropoids, showing a male western lowland gorilla, a male human, a male bonobo, a female Bornean orangutan, and male and female northern white-cheeked gibbons, all labeled and depicted to scale. — primate Representative apes (superfamily Hominoidea).

While some fossils from the Paleocene Epoch have historically been considered primates, their status is often debated, with some researchers suggesting they may belong to the order Dermoptera instead.12

Consequently, the first fully recognizable primate forms did not emerge until the Eocene Epoch (approximately 56 million to 33.9 million years ago). During this period, distinct groups appeared that are clearly identifiable as primates, including the Adapidae (ancestors of lemurs and lorises), the Omomyidae (possible ancestors of monkeys and apes), and the Tarsiidae (tarsiers).34