Gephyromantis tandroka 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Mantellidae

Scientific Name: Gephyromantis tandroka (Glaw & Vences, 2001)
Mantidactylus tandroka Glaw & Vences, 2001
Taxonomic Source(s): Frost, D.R. 2015. Amphibian Species of the World: an Online Reference. Version 6.0. New York, USA. Available at:

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii) ver 3.1
Year Published: 2016
Date Assessed: 2015-11-26
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Stuart, S.N.
Contributor(s): Raxworthy, C.J., Andreone, F. & Glaw, F.
Facilitator/Compiler(s): Luedtke, J. & Hobin, L.
Listed as Vulnerable because its extent of occurrence (EOO) is 9,749 km2, it is known from fewer than 10 threat-defined locations, and there is ongoing decline in the extent and quality of habitat in northeastern Madagascar.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is known with certainty only from the Marojejy Massif at 700-1,400m asl in north-eastern Madagascar. Specimens recorded from Tsaratanana between 1,620-2,000m asl (Raxworthy et al., 2008) and Sorata (F. Glaw unpubl. data November 2015) have also been included in the distribution for this assessment. Its extent of occurrence (EOO) is 9,749 km2.
Countries occurrence:
Additional data:
Number of Locations:1-9
Lower elevation limit (metres):700
Upper elevation limit (metres):1400
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is an abundant species however, due to ongoing decline in the extent and quality of habitat, its population is suspected to be decreasing.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:It is usually observed near streams and tiny trickles of water in rainforest, where it can be found climbing on low vegetation, but it is not found in heavily degreaded habitat. Its breeding biology is unknown, and could be by either direct or larval development.
Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:Yes
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): Its forest habitat is receding due to subsistence agriculture (including livestock grazing), timber extraction, charcoal manufacture, the spread of invasive eucalyptus, and expanding human settlements. Pressure from these threats are high on the Sorata Massif (F. Glaw pers. comm. November 2015).

Intensive illegal wood extraction of rosewood species within Marojejy National Park that followed the 2009 political crisis of Madagascar caused concerns for the survival of rainforest–restricted species, such as this one. However, while illegal rosewood logging has probably ceased, wood extraction currently taking place in the Park seems to occur at lower elevations and is not thought to have reached elevations where this species has been recorded; along the boundaries of Marojejy deforestation is taking place to clear land for agriculture (F. Glaw pers. comm. November 2015).

Species in this genus have tested positive for Batrachochytrium dendrobatidis (Bd), however currently there have been no negative effects observed within amphibian populations in Madagascar suggesting the Bd strain has a low virulence level (Bletz et al., 2015).

Conservation Actions [top]

Conservation Actions:

Conservation Actions
This species occurs in Marojejy National Park and Tsaratanana Strict Nature Reserve.

Conservation Needed
Improved protection of forests in the region is required. Inclusion of the Sorata Massif in Madagascar's protected area network is recommended.

Research Needed
Further research is required to clarify the species' distribution, population size and trend, and it is essential to fully understand the distribution, origin, type and virulence of Bd lineages found in Madagascar (Bletz et al., 2015).

Citation: IUCN SSC Amphibian Specialist Group. 2016. Gephyromantis tandroka. The IUCN Red List of Threatened Species 2016: e.T57525A84176876. . Downloaded on 26 September 2018.
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