Who are the earliest primates are most similar to?

The earliest primates are most similar to modern-day prosimians, such as lemurs and tarsiers. These early primates, which emerged around 65 million years ago, exhibited traits like grasping hands and forward-facing eyes, indicative of their arboreal lifestyle. Their anatomical and behavioral characteristics suggest a close evolutionary link to these primitive primate groups. Overall, they represent a transitional phase in primate evolution, bridging the gap between small mammals and more advanced primates.