Loris tardigradus nycticeboides Hill, 1942

Horton Plains slender loris, Ceylon Mountain slender loris, Highland slender loris, Montane slender loris



Taxonomy & Nomenclature

Synonym/s: Loris tardigradus nyctoceboides Hill, 1942 [orth. error]


Conservation Status

Last record: 1937 or later

Rediscovered in 2002 (Nekaris, 2003)

IUCN RedList status: Endangered



Horton Plains, Nuwara Eliya District, Central Province, Sri Lanka (central)


Biology & Ecology










Original scientific description:

Hill. W. C. O. (1942). The slender loris of the Horton Plains, Ceylon, [i]Loris tardigradus nycticeboides[/i] subsp. nov. Journal of the Bombay Natural History Society 43: 73-78.


Other references:

Gamage, Saman, Reardon, James T., Padmalal, U. K. G. K. and Kotagama, S. W. (2010). First Physical Examination of the Horton Plains Slender Loris, Loris tardigradus nycticeboides, in 72 Years. Primate Conservation 25: 57-60.

Molur, S., Brandon-Jones, D., Dittus, W., Eudey, A., Kumar, A., Singh, M., Feeroz, M. M., Chalise, M., Priya, P. and Walker, S. 2003. Status of South Asian Primates: Conservation Assessment and Managment Plan Report. Workshop Report, 2003. Zoo Outreach Organization/CBSG-South Asia, Coimbatore, India.

Nekaris, K. 2003. Rediscovery of the Ceylon Mountain slender loris in the Horton Plains National Park, Sri Lanka. Asian Primates 8(3-4): 1-7.

Nekaris, A. 2008. Loris tardigradus ssp. nycticeboides. The IUCN Red List of Threatened Species 2008: e.T39756A10262765. . Downloaded on 17 October 2015.

Nekaris, K. A. I. and Jayewardene, J. 2003. Pilot study and conservation status of the slender loris (Loris tardigradus and L. lydekkerianus) in Sri Lanka. Primate Conservation 19: 83-90.

Nicholls, L. 1939. Period of gestation of Loris. Nature, Lond. 143: 246.

Schulze, H. and Meier, B. (1995). The subspecies of Loris tardigradus and their conservation status: a review. In: L. Alterman, G. A. Doyle, and M. K. Izard (eds), Creatures of the Dark: The Nocturnal Prosimians, Plenum Press, New York, USA.


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