Here is another take on the homonid/homonin nomenclature from the Australian Museum:
Hominid and hominin – what’s the difference?
The terms ‘hominid’ and ‘hominin’ are frequently used in human evolution.
New definitions
The most commonly used recent definitions are:
Hominid – the group consisting of all modern and extinct Great Apes (that is, modern humans, chimpanzees, gorillas and orangutans plus all their immediate ancestors).
Hominin – the group consisting of modern humans, extinct human species and all our immediate ancestors (including members of the genera Homo, Australopithecus, Paranthropus and Ardipithecus).
Hominid and hominin – what’s the difference?
The terms ‘hominid’ and ‘hominin’ are frequently used in human evolution.
New definitions
The most commonly used recent definitions are:
Hominid – the group consisting of all modern and extinct Great Apes (that is, modern humans, chimpanzees, gorillas and orang-utans plus all their immediate ancestors).
Hominin – the group consisting of modern humans, extinct human species and all our immediate ancestors (including members of the genera Homo, Australopithecus, Paranthropus and Ardipithecus).
- See more at: http://australianmuseum.net.au/hominid-and-hominin-whats-the-difference#sthash.UpOGtXy4.dpuf