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). Hominid used to have the same meaning as hominin. It referred only to the line leading to modern humans. But it has now been broadened to include the lines leading to all the Great Apes. [[apes vs monkeys]] 'Family' names always end in '-idae'. 'Sub-family' names always end in '-inae'. 'Tribe' names always end in '-ini'. So hominid, hominine and hominin represent groups of descending size. > Over time, biological classifications change due to improved techniques and better knowledge about the biology and the evolutionary relationships of different living things. Now, with their better knowledge, scientists have revised their classifications to develop more up-to-date evolutionary trees. In this scheme, only two families are recognised with all the Great Apes (including humans) placed into the same family, the Hominidae or hominids. The next branching of this evolutionary tree divides the orang-utans into one subfamily and all the remaining Great Apes into another subfamily. Then at the tribe level, gorillas, chimpanzees and humans separate onto different branches of the evolutionary tree with humans in the Hominini or hominin branch. As a result of this classification change, modern humans and all our extinct ancestors on our own branch of the evolutionary tree are now known as hominins rather than as hominids as they were formerly known in old classifications.^[“Hominid and Hominin – What’s the Difference?” The Australian Museum. Accessed August 3, 2020. australian.museum/learn/science/human-evolution/hominid-and-hominin-whats-the-difference/.]