- Eulemur albocollaris (Rumpler, 1975)
Discussed by Groves (2001c), who recognized it with a query. The two known specimens (both females) are somewhat different, and both are unlike any known taxon, although females of some taxa, such as E. albocollaris, are poorly known and proper comparison is difficult.
- Eulemur cinereiceps in Mammal Species of the World.
Wilson, Don E. & Reeder, DeeAnn M. (Editors) 2005. Mammal Species of the World – A Taxonomic and Geographic Reference. Third edition. ISBN 0-8018-8221-4.
- Mittermeier, R., Ganzhorn, J., Konstant, W., Glander, K., Tattersall, I., Groves, C., Rylands, A., Hapke, A., Ratsimbazafy, J., Mayor, M., Louis, E., Rumpler, Y., Schwitzer, C. & Rasoloarison, R. (December 2008). "Lemur Diversity in Madagascar". International Journal of Primatology 29 (6): 1607–1656.