Knuckle-walking hominid ancestors.
Corruccini
R S
RS
McHenry
H M
HM
D000818:Animals; D005580:Fossils; D015186:Hominidae / Q000033:anatomy & histology / Q000502:physiology*; D006801:Humans; D011323:Primates / Q000033:anatomy & histology / Q000502:physiology*; D016138:Walking / Q000502:physiology*