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Stuart B.L.,North Carolina Museum of Natural science | Stuart B.L.,University of California at Berkeley | Phimmachak S.,National University of Laos | Phimmachak S.,Wildlife Conservation Society | And 2 more authors.
Zootaxa | Year: 2010

A new species in the morphologically conservative Tylototriton asperrimus group is described from Khammouan Province, Laos. Molecular phylogenetic analysis of mitochondrial DNA confirms its placement in the T. asperrimus group. Tylototriton notialis sp. nov. is diagnosable in mitochondrial DNA, nuclear DNA, and morphology from its congeners. The new species represents the first record of the genus from Laos, and is the southernmost known member of the T. asperrimus group. Copyright © 2010 · Magnolia Press. Source

Duckworth J.W.,Wildlife Conservation Society | Boonratana R.,Mahidol University | Robichaud W.G.,Nam Theun 2 Watershed Management and Protection Authority | Timmins R.J.,Wildlife Conservation Society
Primate Conservation | Year: 2010

A monkey population allied to François' leaf monkey Trachypithecus francoisi discovered in 1920 constitutes the taxon laotum, endemic to Lao PDR. The next seven decades provided very little additional information about it. Wildlife surveys in the 1990s found a large population of T. (f.) laotum in Phou Hinpoun (=Khammouan Limestone) National Protected Area (NPA) and north into southern Nam Kading NPA, and a large population in and around Hin Namno NPA of T. (f.) ebenus, known outside Lao PDR only from adjoining Vietnam. Detailed here are confirmed records of smaller and more localized populations of leaf monkeys of the T. francoisi group (sensu Groves 2001, 2005, p. 175) from two other areas (Nakai-Nam Theun NPA and a region outside the protected area system, Muang (= District of) Vilabouli, in Savannakhet province), highly plausible reports from one more site, and records of T. (f.) ebenus from southern Phou Hinpoun NPA. Animals from Nakai-Nam Theun NPA and Muang Vilabouli differ in pelage from reported forms, and further information is required to resolve their taxonomy in relation to the named forms hatinhensis and ebenus. All Lao records of the Trachypithecus francoisi group leaf monkeys are within the latitudinal band of 16°58′N (probably 16°49′N) to 18°17′N, but reports from local people suggest the possibility of occurrence north of this latitude, and perhaps (parallel with the complex's distribution in Vietnam) north to the Chinese border. Populations in large karst landscapes remain healthy but cannot be assumed to remain so, and those in smaller karst and non-calcareous ranges are highly vulnerable to hunting-induced local extinction. Many uncertainties remain concerning the species-complex in Lao PDR: its overall distribution, the number of forms present, their distribution, and their taxonomy. Undescribed forms may yet be found, most likely to the north of the known range, where threats are much higher, adding to the urgency for surveys in this region. Source

Coudrat C.N.Z.,Oxford Brookes University | Nanthavong C.,Nam Theun 2 Watershed Management and Protection Authority | Nekaris K.A.I.,Oxford Brookes University
ORYX | Year: 2014

The Endangered red-shanked douc Pygathrix nemaeus is a charismatic Asian colobine endemic to Vietnam, Cambodia and Lao People's Democratic Republic (PDR). The largest population is found in central-eastern Lao PDR but it has never been quantified. We conducted line-transect surveys in Nakai-Nam Theun National Protected Area in 2011-2012. We used distance sampling combined with a habitat suitability model to estimate group density and group abundance in the area. Our analysis yielded a density of 2.8 (range 1.9-4.1) groups per km2 and c. 4,420 groups within the predicted c. 1,600 km2 of suitable habitat in Nakai-Nam Theun. These are the only available data for P. nemaeus in Lao PDR to date. We discuss the limitations of our survey, which involved potential violations of the distance sampling method, and highlight the challenges of using this method for primates. We also consider the importance of assessing limitations in distance sampling studies, to evaluate reliability and facilitate comparisons. The population of P. nemaeus in Lao PDR is under threat from illegal hunting and is not the focus of any specific conservation action. To avoid a repetition of the decline the species has already experienced in Vietnam, and to secure the species' global survival, conservation projects need to target the population in Nakai-Nam Theun. A long-term conservation and research project in this key biodiversity area will also benefit other threatened and unique co-existing species. Copyright © Fauna & Flora International 2013. Source

Stuart B.L.,North Carolina Museum of Natural science | Hallam C.D.,Wildlife Conservation Society | Sayavong S.,Nam Theun 2 Watershed Management and Protection Authority | Nanthavong C.,Nam Theun 2 Watershed Management and Protection Authority | And 3 more authors.
Chelonian Conservation and Biology | Year: 2011

Two geoemydid turtle species, Geoemyda spengleri and Cuora bourreti, are documented from Laos for the first time. The record of G. spengleri is based on photographs taken of a wild turtle by staff in a protected area in eastern Bolikhamxay Province, central Laos. Those of C. bourreti are based on our examinations of live turtles in the possession of a hunter and in a village in a remote area of eastern Savannakhet Province, southeastern Laos. Both localities lie near the border with Vietnam, where these species were previously known. Turtles are highly threatened in Laos from overexploitation for food and traditional medicine purposes, but the presence of G. spengleri and C. bourreti within protected areas offers hope for their persistence. © 2011 Chelonian Research Foundation. Source

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