Sylvirana mortenseni 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Ranidae

Scientific Name: Sylvirana mortenseni (Boulenger, 1903)
Hylarana mortenseni (Boulenger, 1903)
Rana mortenseni Boulenger, 1903
Taxonomic Notes: This species was removed from synonymy of Hylarana nigrovitatta without comment by Dubois (1992), and treated as a valid species by Inger, Orlov and Darevsky (1999). It was regarded as a synonym of H. nigrovittata by Matsui et al. (2001) but treated as a valid species by Ohler, Swan and Daltry (2002) and hence here also.

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Needs updating
Assessor(s): Peter Paul van Dijk, Steven Swan
Reviewer(s): Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson and Neil Cox)
Listed as Near Threatened because its Extent of Occurrence is probably not much greater than 20,000 km2, and the extent and quality of its habitat are probably declining, thus making the species close to qualifying for Vulnerable.

Geographic Range [top]

Range Description:This species is known from the type locality, the island of Koh Chang, Trat Province, in south-east Thailand, and is also found in the Cardamom Mountains of Cambodia (Ohler, Swan and Daltry 2002). It has been recorded below 800m asl.
Countries occurrence:
Cambodia; Thailand
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is common in Koh Chang (T. Chan-ard pers. comm.) and also in the Cardamom Mountains at lower altitudes (S. Swan pers. comm.).
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is known from evergreen forest on the lower slopes of the mountains as well as in gallery forest, and also heavily disturbed areas and forest edge habitat. Males were heard calling from near streams where they were concealed in undergrowth. The exact breeding habits are unknown.
Systems:Terrestrial; Freshwater

Threats [top]

Major Threat(s): A threat to this species is probably the clear-cutting of forests although it appears to also inhabit disturbed areas.

Conservation Actions [top]

Conservation Actions: Its range includes Ko Chang National Park, and several protected areas within the Cardamom Mountains of Cambodia. Surveys to determine the species' range, habitat requirements and population status are needed.

Errata [top]

Errata reason: This species has been moved to the genus Sylvirana (previously Hylarana).

Citation: Peter Paul van Dijk, Steven Swan. 2004. Sylvirana mortenseni (errata version published in 2016). The IUCN Red List of Threatened Species 2004: e.T58674A89368977. . Downloaded on 20 June 2018.
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