Discussion
All the seemingly similar ancestors who are on the direct line of evolution of man are grouped into a single family Hominidae. All of the following belong to Hominidae, except :
Answer: D
The one that does not belong is Therapsids.
Therapsids are the 'mammal-like reptiles' of the Permian and Triassic, from which the mammals arose some 200 million years ago. They are ancestors of all mammals, not members of the human family.
The other three are primates that the textbook account places on the line leading to man: Proconsul (an early Miocene ape), Ramapithecus (once regarded as an early hominid) and Australopithecus (the southern ape-man). Modern classification places Proconsul in a family of its own and treats Ramapithecus as part of Sivapithecus, but under either view therapsids are the clear exception.
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