>>12564956there were.
when an original population sparates int two populations who dont interbreed, speciation begins. geographical barriers, differences in mating rituals etc can cause this. as a resault you have two different species with a common ancestor population. this hapened to us, but then we met our sister populations and fucking murdered them.
Homos sapiens lived alongside several members of the australopitecus family, homo erectus, homo habilis, homo heidelbergensis, homo neanderthalis, homo floresiencis and arguably a few others. most of them we killed, but we did interbreed with them a bit.
new species of human like creatures could evolve from primates, if the circomstances were condusive to that, but circomstances have changed in the past few milion and especially tha past few hundred thousand years.
but you might be in luck, a chinese lab put human intelligence contributing genes in monkeys.