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Madagapotamon humberti 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Malacostraca Decapoda Potamonautidae

Scientific Name: Madagapotamon humberti 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: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-07-12
Assessor(s): Cumberlidge, N.
Reviewer(s): Ranaivoson, C.H., Randrianasolo, H., Rasamy, J. & Van Damme, D.
Facilitator/Compiler(s): Sayer, C.
Justification:
This species is listed as Least Concern as it occurs in three protected areas where its habitat is unlikely to be disturbed. It is not collected for food and there are no known current threats.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species occurs in 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 southwest 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), Antsiranana, 230 m asl.
Countries occurrence:
Native:
Madagascar
Additional data:
Lower elevation limit (metres):230
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 five different localities and this species could be locally common.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

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 northeast/southwest 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).

This species occurs in deciduous forest on limestone. Individuals have been found climbing on trees in the rainy season. It probably passes the dry season in very deep fissures and sinkholes in the karst. It is not uncommon on the rocks in the forest that covers the western slopes of the Montagne des Français. They are extremely active in the dry season, living in holes in the rocks and coming out as soon as the rains begin (Vuillemin 1970).
Systems:Terrestrial; Freshwater

Use and Trade [top]

Use and Trade: This species is not used.

Threats [top]

Major Threat(s): There are no current threats to this species as it occurs in three protected areas that are not heavily impacted by human activities.

Conservation Actions [top]

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

Citation: Cumberlidge, N. 2016. Madagapotamon humberti. The IUCN Red List of Threatened Species 2016: e.T134826A87566246. . Downloaded on 13 December 2017.
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