Indochinese Black Langur

Taxobox
name = Indochinese Black LangurMSW3 Groves|]
status = DD
status_system = iucn2.3
status_ref = IUCN2007 | assessors = Eudey, A. & Members of the Primate Specialist Group | year = 2000 | title = Trachypithecus francoisi "ssp." ebenus | id = 39854 | downloaded = 2008-04-15]
regnum = Animalia
phylum = Chordata
classis = Mammalia
ordo = Primates
familia = Cercopithecidae
genus = "Trachypithecus"
species_group = "T. francoisi"
species = "T. ebenus"
binomial = "Trachypithecus ebenus"
binomial_authority = Brandon-Jones, 1995

The Indochinese Black Langur ("Trachypithecus ebenus") is a poorly known lutung native to Laos and adjacent Vietnam.Brandon-Jones, D., Eudey, A. A., Geissmann, T., Groves, C. P., Melnick, D. J., Morales, J. C., Shekelle, M. and Stewart, C.-B. 2004. "Asian primate classification." International Journal of Primatology 25(1): 97-164.] It was originally described as a subspecies of "T. auratus",Bradon-Jones, D. 1995. "A revision of the Asian pied leaf monkeys (Mammalia: Cercopithecidae: Superspecies Semnopithecus auratus), with the description of a new subspecies." Raffles Bull. Zool. 43: 3-43] but was later found to be a member of the "T. francoisi" group, with some maintaining it as a subspecies of that species. In 2001, it was recommended treating it as a separate species.

Except for its almost entirely black pelage, it resembles the other members of the "T. francoisi" group. Uniquely in this group, it and the related "T. hatinhensis" appear to be parapatric, "T. ebenus" showing what appears to be signs of intergradation with "T. hatinhensis" are know, [ Duckworth, J. W., Salter, R. E., and Khounboline, K. (eds). "1999 Wildlife in Lao P.D.R: 1999 status report." Vientiane: IUCN, WCS and CPAWM.] and genetically the two barely are separable.Roos, C. 2004. "Molecular evolution and systematics of Vietnamese primates." In: Nadler, T., U. Streicher, and Ha Thang Long (eds). Conservation of Primates in Vietnam: 23-28.] Roos, C., T. Nadler, Y. P. Zhang, H. Zischler. 2001. "Molecular evolution and distribution of the superspecies Trachypithecus [francoisi] ." Folia Primatol. 72: 181-182.] This has lead to suggestions that it may be a black morph of that taxon, [http://www.primatecenter.org/prim.htm#bl Black Langur (Trachypithecus ebenus).] EPRC. Accessed 2008-07-21] which in turn possibly should be considered a subspecies of "T. laotum".

References