Final answer:
The most specific group in which prosimians can be placed is the 'primates' group. This group is divided into prosimians and anthropoids, with prosimians being the more primitive and including species like lemurs and tarsiers.
Step-by-step explanation:
The most specific group in which prosimians can be included is primates. Within the order of primates, there are two main groupings: prosimians and anthropoids. Prosimians, such as the bush babies of Africa, the lemurs of Madagascar, and the lorises, pottos, and tarsiers of Southeast Asia, represent the more primitive of the primate groups.
Contrarily, anthropoids include monkeys, lesser apes, and great apes, which differ from prosimians in being mostly diurnal, generally larger, and possessing relatively larger brains. The categories hominoids, Homo, and hominids are more specific to the lineages that include the great apes and humans and thus are not appropriate for categorizing prosimians.