Presbytis thomasi (Collett, 1893)

Thomas's Leaf-monkey

Species recognized by The Integrated Taxonomic Information System external link, T Orrell (custodian) in 
IUCN Red List Status: Vulnerable (VU) external link Showing: scientific names

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Table of Contents

Morphology

Physical Description

Source and Additional Information
Supplier
Animal Diversity Web external link
Copyright
©1995-2008, The Regents of the University of Michigan and its licensors. Some rights reserved external link
Author
Mika Matthews, University of Michigan
Editor
Nancy Shefferly, Animal Diversity Web Staff
Editor
Phil Myers, Museum of Zoology, University of Michigan
Editor
Matthew Wund, University of Michigan
Source URL
View original data object external link
Citation
Matthews, M. and P. Myers. 2004. "Presbytis thomasi" (On-line), Animal Diversity Web. Accessed October 26, 2009 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Presbytis_thomasi.html. 

 

Presbytis thomasi has a very distinct appearance. Due to their unique facial coloration, it is easy to distinguish North Sumatran leaf monkeys from other primates. The white fur on the underside and arms (which contrasts with the black fur surrounding the rest of the body) continues up around the neck. Two other white stripes, starting from the top of the head, run down the sides, come together in a V-shape at the eyes and encircle them. A purple-silver colored inner layer forms rings around the orange-brown eyes. Inside of the dark tint, one can see the pinkish skin of Thomas's langur. This same pinkish skin covers the muzzle.

 

The average size of Thomas's langur is 6.69 kilograms for adult females and 6.67 kilograms for adult males. The tail length is between 500 and 850 mm, and the head and body length ranges between a mere 420 and 620 mm. (Colijn and Muchtar, 1996; Flannery, 2004; Nowak, 1999)

 
References
  • Nowak, R. 1999. Primates; Family CERCOPITHECIDAE: Old World Monkeys. Pp. 599-600 in Walker's Mammals of the World, Vol. I, 6th Edition. Baltimore and London: The Johns Hopkins University Press.
  • Colijn, E., M. Muchtar. 1996. "Primates of Indonesia--Presbytis Thomasi (Collet, 1893)" (On-line). The Indonesian Nature Conservation Database. Accessed February 08, 2004 at http://www.nature-conservation.or.id/primates/presbytis_thomasi.html .
  • Flannery, S. 2004. "Thomas's Leaf-monkey (Presbytis thomasi)" (On-line). The Primata. Accessed April 10, 2004 at http://members.tripod.com/uakari/presbytis_thomasi.html .
"Presbytis thomasi (Collett, 1893)". Encyclopedia of Life, available from "http://www.eol.org/pages/311432". Accessed 21 Mar 2010.