Gephyromantis webbi 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Mantellidae

Scientific Name: Gephyromantis webbi
Species Authority: (Grandison, 1953)
Common Name(s):
English Webb's Madagascar Frog
Mantidactylus webbi (Grandison, 1953)
Rhacophorus webbi Grandison, 1953
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: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Andreone, F. & Vences, M.
Reviewer(s): Stuart, S.N., Chanson, J.S. & Cox, N.A.
Listed as Endangered because its Extent of Occurrence is less than 5,000 km2 and its Area of Occupancy is less than 500 km2, its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat in northeastern Madagascar.
Previously published Red List assessments:
2004 Endangered (EN)

Geographic Range [top]

Range Description: This species occurs around the Antongila Bay and on the island of Nosy Mangabe in north-eastern Madagascar. Records from Andohahela in south-eastern Madagascar require confirmation, and are not included here. It has been recorded from sea level up to 100m asl.
Countries occurrence:
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It is locally common.
Current Population Trend: Decreasing
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: It inhabits very low altitude rainforest, living along rocky streams among boulders and moss, and is intolerant of disturbed habitat. It breeds along streams under mossy boulders, the eggs being laid on rocks.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): The major threat is habitat loss due to subsistence agriculture, timber extraction, and expanding human settlements. Forest loss is particularly severe on the coast of mainland Madagascar.

Conservation Actions [top]

Conservation Actions: It occurs in the Réserve Spéciale de Nosy Mangabe, but is not yet confirmed from Parc National de Masoala.

Citation: Andreone, F. & Vences, M. 2008. Gephyromantis webbi. The IUCN Red List of Threatened Species 2008: e.T57532A11654554. . Downloaded on 28 May 2016.
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