Archaeoindris
Though similar to "Palaeopropithecus", "Archaeoindris" was significantly larger and more robust. "Archaeoindris" was one of the largest primates to ever evolve, and was the largest-known strepsirrhine primate, weighing an estimated . It was roughly the size of an adult male gorilla, which was first noted by Lamberton.
List of fossil primates
The order Primates, established by Linnaeus in 1758, includes humans and their immediate ancestors. However, contrarily to the common opinion, most primates do not have especially large brains. Brain size is a derived character, which only appeared with genus "Homo", and was lacking in the first hominid. In fact, hominid encephalization quotient is only 1.5 Ma more recent than that of some dolphin species. The encephalization quotient of some cetaceans is therefore higher than that of most primates, including the nearest relatives of humans, such as "Australopithecus".