Mesolemur

Mesolemur is an extinct species of primate and the oldest primate ever found, living from Late Cretaceous to Early Paleocene from 70.3 million years ago to 57 million years ago in what is what is now both North and South America. It was most likely an omnivore that was mostly an insectivore that feed on lots of invertebrates, but also likely fed on some fish, roots, tubers, and fruits, as some evidence suggests. They likely ranged from about the size of a medium-sized rat to about the size of a large guinea pig, depending on a species. They were the first ever primates discovered to have been digging animals, which helped these early primates survived the mass extinction at the end of the Cretaceous period and the whole Mesozoic era itself. After the mass extinction, descendants of Mesolemur evolved into wide variety of primates today such as lorises, tarsiers, bushbabies, lemurs, monkeys, and apes (inclduing common humans, Elecman.EXEs, etc).