Macropus is a marsupial genus that belongs to the family Macropodidae.It has thirteen extant species which are further divided into three subgenera. The genus includes all terrestrial kangaroos, wallaroos, and several species of wallaby.The term itself is derived from the Ancient Greek μάκρος, makros long and πους, pous foot. A further eleven extinct species are recognised. The type species is the eastern grey kangaroo.he genus includes all terrestrial kangaroos, wallaroos, and several species of wallaby. The term itself is derived from the Ancient Greek μάκρος, makros long and πους, pous foot. A further eleven extinct species are recognised.