Platymantis isarog 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Ceratobatrachidae

Scientific Name: Platymantis isarog Brown, Brown, Alcala and Frost, 1997
Platymantis reticulatus Brown, Brown and Alcala, 1997
Taxonomic Source(s): Frost, D.R. 2017. Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History, New York, USA Available at:

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2018
Date Assessed: 2017-05-25
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Luedtke, J. & Bowles, P.
Contributor(s): Mallari, A., Alcala, A., Diesmos, A.C., Gutierrez, B., Ubaldo, D., Gee, G., Hampson, K., Afuang, L.E., Diesmos, M., Ong, P. & Brown, R.
Facilitator/Compiler(s): Neam, K., Hobin, L.
Listed as Least Concern because, although the distribution is limited, there are no current threats, it has a stable population, and it occurs in a well-protected area.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species was previously known only from Mount Isarog on southeastern Luzon Island, Philippines. It has now been confirmed as also occurring on Mount Malinao (Philippines Red List Assessment Workshop May 2017). Its elevational range is 650–1,800 m asl and the extent of occurrence (EOO) of this expanded range is 640 km2.
Countries occurrence:
Additional data:
Lower elevation limit (metres):650
Upper elevation limit (metres):1800
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is common in mid- to upper-montane forests on Mount Isarog. The population appears to be stable.
Current Population Trend:Stable
Additional data:
Population severely fragmented:Unknown

Habitat and Ecology [top]

Habitat and Ecology:This species inhabits arboreal microhabitats in mossy and montane rainforests, and deposits its eggs on leaves in shrub layer vegetation. It breeds by direct development.
Continuing decline in area, extent and/or quality of habitat:No
Movement patterns:Not a Migrant

Use and Trade [top]

Use and Trade: There are no records of this species being utilized.

Threats [top]

Major Threat(s): Of the two sites at which the species occurs, Mt. Isarog is presently a generally well-protected locality where the species is not highly threatened by habitat loss. Geothermal energy is generated on the slopes Mt. Malinao, but its impact is limited and one of the plants was recently decommissioned due to decrease in steam supply (Philippines Red List Assessment Workshop May 2017). Both sites where the species is known to occur are dormant volcanoes, however it is not thought to be at risk of extinction from future volcanic activity.

Conservation Actions [top]

Conservation Actions: Conservation Actions
This species occurs in Mount Isarog National Park.

Conservation Needed
The most important conservation measure needed at present is the continued management of Mount Isarog National Park.

Research Needed
There is also a need for continued monitoring of the population status of this species.

Classifications [top]

1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
suitability:Suitable season:resident major importance:Yes
1. Forest -> 1.9. Forest - Subtropical/Tropical Moist Montane
suitability:Suitable season:resident major importance:Yes
2. Land/water management -> 2.1. Site/area management

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education
10. Geological events -> 10.1. Volcanoes
♦ timing:Unknown ♦ scope:Unknown ♦ severity:Unknown ⇒ Impact score:Unknown 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality

3. Energy production & mining -> 3.3. Renewable energy
♦ timing:Ongoing ♦ scope:Minority (<50%) ♦ severity:No decline ⇒ Impact score:Low Impact: 4 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

3. Monitoring -> 3.1. Population trends

Bibliography [top]

Alcala, A.C. and Brown, W.C. 1985. Philippine Amphibians: An Illustrated Field Guide. Bookmark Press, Makati City, Philippines.

Alcala, A.C. and Brown, W.C. 1999. Philippine frogs of the genus Platymantis (Amphibia: Ranidae). Philippine Journal of Science 128: 281-287.

Brown, R.M., Diesmos, A.C. and Alcala, A.C. 2001. The state of Philippine herpetology and the challenges for the next decade. Silliman Journal 42(1): 18-87.

Brown, W.C., Brown, R.M., Alcala, A.C. and Frost, D. 1997. Replacement name for Platymantis reticulatus Brown, Brown, and Alcala, 1997 (Ranidae:Raninae). Herpetological Review: 131.

Brown, W.C., Brown, R.M. and Alcala, A.C. 1997. Species of the hazelae group of Platymantis (Amphibia: Ranidae) from the Philippines, with descriptions of two new species. Proceedings of the California Academy of Sciences 49: 405-421.

IUCN. 2018. The IUCN Red List of Threatened Species. Version 2018-1. Available at: (Accessed: 28 June 2018).

Citation: IUCN SSC Amphibian Specialist Group. 2018. Platymantis isarog. The IUCN Red List of Threatened Species 2018: e.T29591A58476084. . Downloaded on 21 July 2018.
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