Which of the following is NOT one of the four Eocene primate groups?

The Hominidae family, which includes modern humans, our ancestors, and the great apes, is not part of the Eocene epoch primate groups. The Eocene, occurring around 56 to 33.9 million years ago, is significant for the emergence of early primates. The Adapidae and Omomyoidea are both recognized as Eocene primate groups, representing different evolutionary branches. Oligopithecidae, while primarily associated with the Oligocene epoch, is often included in discussions of early primates due to its proximity in the evolutionary timeline.

In contrast, Hominidae represents a later stage in primate evolution, specifically linked to the Miocene and later periods, which is after the Eocene epoch. Thus, it is correct to identify Hominidae as not part of the four Eocene primate groups, as it signifies a more advanced lineage that developed much later in the evolutionary timeline.