References in classic literature ?
Although no graduated links of structure, fitted for gliding through the air, now connect the Galeopithecus with the other Lemuridae, yet I can see no difficulty in supposing that such links formerly existed, and that each had been formed by the same steps as in the case of the less perfectly gliding squirrels; and that each grade of structure had been useful to its possessor.
Group IV included Muridae and Lemuridae formed Group V.
One feature of Madagascar's fauna that is very typical is the Lemuridae, a group of primitive primates that were formerly widespread throughout the world but are now restricted to the Madagascar forest.