What genus does the chimpanzee that the has a similar mating system to early humans, according to the authors of "Sex at Dawn", make up?
Sex at Dawn:  According to the authors, before agriculture, sex was relatively promiscuous, and paternity was not a concern, in a similar way to the mating system of Bonobos. Bonobo: The bonobo ( or ; "Pan paniscus"), formerly called the pygmy chimpanzee and less often, the dwarf or gracile chimpanzee, is an endangered great ape and one of the two species making up the genus "Pan"; the other is "Pan troglodytes", or the common chimpanzee.
Pan