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91. Guibemantis diphonus

Guibemantis diphonus


Guilbemantis diphonus is only known from two male individual specimens, originally found in the Manomba Special Reserve in Madagascar, where it is endemic.

This species is part of the Mantellidae frog family, which diverged from all other amphibian lineages about 50 million years ago, which makes them as dissimilar from their closest relatives as porcupines are from chinchillas. Very little is known about the ecology of this species due to the lack of specimens found. A major threat to this species is that there is very little remaining littoral forest in southeast Madagascar, all of which are subject to ongoing deforestation for timber and charcoal production, subsistence agriculture, livestock grazing, regular burning to maintain cattle pasture and expanding human settlements. The Manomba Special Reserve is reasonably well protected but is already quite degraded. It is along a major road and heavily impacted by cyclones which have destroyed a large part of the remaining forest in the reserve.

  • Order: Anura
  • Family: Mantellidae
  • Population: Rare
  • Trend: decreasing
  • Size: 33.5mm

EDGE Score

EDGE Score: 5.88 (?)
ED Score: 21.31 (?)
GE / IUCN Red List (?)
Not Evaluated Data Deficient Least Concern Near Threatened Vulnerable Endangered Critically Endangered Extinct in the Wild Extinct


This species is only known from where it was originally found in Manombo Special Reserve, 50 metres above sea level in south-eastern Madagascar.

Habitat and Ecology

Specimens were found in low vegetation, along a small, shallow stream within a disturbed area of low altitude, littoral forest.

Find out more

This wordcloud illustrates the threats facing this species. The size of each word indicates the extent of a species range that is affected by that threat (larger size means a greater area is affected). The colour of the word indicates how much that threat impacts the species (darker shades of red mean the threat is more severe).

Urban development Crops Livestock Mining Logging Fire

Threat wordcloud key:

Small area affected
Large area affected
Least severe
Most severe
Severity unknown
Source: The IUCN List of Threatened Species. Version 2017.1.
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