It has long been a pet peeve of mine when people talk about apes
calling them "monkeys". Recently I've seen bonobos being called
猿 in an anime, so from that it's pretty clear that 猿 also refers
to apes informally in Japanese. So I've been wondering: Does 猿
also mean ape in technical/scientific Japanese speech? From what
I was able to gather from Wikipedia and dictionaries, apes
(Hominoidea) are ヒト上科 and great apes (Hominidae, which is what a
bonobo is) are called ヒト科. But that does not clarify whether 猿
can be used technically to refer to them, or even if 猿 is
accepted nomenclature in scientific/technical speech at all.