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Madagapotamon humberti

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA ARTHROPODA MALACOSTRACA DECAPODA POTAMONAUTIDAE

Scientific Name: Madagapotamon humberti
Species Authority: Bott, 1965
Taxonomic Notes: This genus was recently transferred to the Potamonautidae: Hydrothelphusinae: Hydrothelphusini by Cumberlidge et al. (2007).

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Cumberlidge, N.
Reviewer(s): Cumberildge, N. and McIvor, A.
Justification:
Listed as Vulnerable under D2 because this species is only known from five locations, and there are long-term threats from human induced habitat loss.

Geographic Range [top]

Range Description: Madagascar: Northern Madagascar, between Ankarana and Analamera and from Montagne des Francais and the island of Nosy Be. The Ankarana massif (Antsiranana Province) is about 100 km south-west of Antsiranana, to the north of Ambilobe. The Ankarana massif is an undeveloped region of limestone formations (karst) consisting of caves and underground rivers with numerous forested valleys forming the Reserve Speciale d’Ankarana. This species has been collected in forest near the Andrafiabe cave, Reserve Speciale d’Ankarana, and in the Reserve Speciale d’Analamerana, Foret d Ankavanana about 19 km southeast of Anivorano-Nord. Madagapotamon humberti is also found on the slopes of the Anosiravo mountains (Antsiranana Province) and Montagne des Francais (Vuillemin, 1972) a few kilometres south of Antsiranana. Photographs of the specimens in Vuillemin (1972) are strikingly like Madagapotamon, rather than Malagasya (as labelled in that work). Cumberlidge and Sternberg (2002) also reported that M. humberti occurs on the nearby island of Nosy Be (Antsiranana Province) and from Baie de Diego, Diego-Suarez (now Antsiranana), Antsirana, 230 m altitude.
Countries:
Native:
Madagascar
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Up to 20 specimens have been collected recently from about 5 different localities and this species could be locally common.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: This semi-terrestrial species is restricted to limestone karst and as such has a limited distribution. Ankarana is aligned obliquely north-east/south-west and forms the western part of a limestone plateau lying to the south of the Parc National de la Montagne d’Ambre. This limestone plateau continues eastward as the Andrafiamena–Analamera escarpment, which ends close to the Baie du Loky. The Ankarana and Andrafiamena escarpments are separated by a low-lying region occupied by the main road between Ambilobe and Antsiranana (Vuillemin 1970). "Forêts à feuilles caduques, sur calcaire (lapias) de l’Ankara et de l’Analamera. Crabe arboricole en saison des pluies. Passe probablement la saison sèche dans les fissures très profondes, les avens et les cours d’eau souterrains de ces lapias. XII.1937 et I.1938”. Ces crabes corps et pinces blanc opaque ne sont pas rares sur les rochers, dans la forêt qui recouvre les pentes ouest de la Montagne des Français. Ils sont extrêmement vifs, à la saison sèche, vivent dans les trous des rochers et sortent dès que la pluie commence."

Found in the forest near the Andrafiabe cave, Réserve Spéciale d’Ankarana; Northern Madagascar, between ‘Ankara and Analamera’. The locality ‘Ankara’ is almost certainly Ankarana (Vuillemin 1970). Northern Madagascar, Ankarana, Montagne des Français and Nosy Be. Madagapotamon humberti is found in the Ankarana massif (Antsiranana Province) about 100 km south-west of Antsiranana, to the north of Ambilobe. The Ankarana massif is an undeveloped region of limestone formations (karst) consisting of caves and underground rivers with numerous forested valleys forming the Réserve Spéciale d’Ankarana. Ankarana is aligned obliquely north-east/south-west and forms the western part of a limestone plateau lying to the south of the Parc National de la Montagne d’Ambre. This limestone plateau continues eastward as the Andrafiamena–Analamera escarpment, which ends close to the Baie du Loky. The Ankarana and Andrafiamena escarpments are separated by a low-lying region occupied by the main road between Ambilobe and Antsiranana (Vuillemin, 1970). Madagapotamon humberti is also found on the slopes of the Anosiravo mountains (Antsiranana Province) and Montagne des Français (Vuillemin 1972) a few kilometres south of Antsiranana.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): Habitat loss.

Conservation Actions [top]

Conservation Actions: No conservation measures are known to be in place for this species, but it is found in a protected area.

Citation: Cumberlidge, N. 2008. Madagapotamon humberti. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 26 November 2014.
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