Literature
- Gray, J. E. 1873. Notes on Propithecus, Indris and other lemurs (Lemurina) in the British Museum. Proc. Zool. Soc. London (3): 846-860. (for 1872).
- Gregory, W.K., 1915. On the classification and phylogeny of the Lemuroidea. Bull. Geol. Soc. Am. 26: 426-446. .