Dypsis sahanofensis

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
PLANTAE	TRACHEOPHYTA	LILIOPSIDA	ARECALES	PALMAE

Scientific Name:	Dypsis sahanofensis
Species Authority:	(Jum. & H.Perrier) Beentje & J.Dransf.
Synonym/s:	Chrysalidocarpus sahanofensis (Jum. & H.Perrier) Jum. Neophloga sahanofensis Jum. & H.Perrier

Assessment Information [top]

Red List Category & Criteria:

Critically Endangered D ver 3.1

Year Published:

2012

Assessor/s:

Rakotoarinivo, M. & Dransfield, J.

Reviewer/s:

Baker, W.J. & Beentje, H.J.

Contributor/s:

Justification:
Known from Mont Vatovavy, Ambositra and Anosibe an'Ala. The distribution range is very fragmented and in each site the number of individuals is very low; the whole population is estimated to be fewer than 40 mature individuals. There are known threats to the habitat which may be causing population declines, but these have not been definitely documented. This species qualifies for a Critically Endangered listing based on the small population size.

History:

1998	–	Endangered
1997	–	Endangered (Walter and Gillett 1998)

Geographic Range [top]

Range Description:	Endemic to Madagascar. Known from submontane and montane forest on the eastern escarpment, between Ambositra and Ampasimanolotra.
Countries:	Native: Madagascar
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	A rare palm with fewer than 40 individuals recorded. The current population trend is unknown.
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	Occurs in montane or submontane rainforest in the middle centre-east of Madagascar. The species grows frequently near the crests of ridges where the canopy is slightly open. Recorded at elevations from 300 up to 1,400 m.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	The main threat to this species is habitat loss through clearance for shifting agriculture and logging.

Major Threat(s):

The main threat to this species is habitat loss through clearance for shifting agriculture and logging.

Conservation Actions [top]

Conservation Actions:	The site in Mont Vatovavy is protected by local taboo, elsewhere only the site in Mangerivola is under protection. Further protection and regular monitoring of this highly threatened species is required.

Conservation Actions:

The site in Mont Vatovavy is protected by local taboo, elsewhere only the site in Mangerivola is under protection. Further protection and regular monitoring of this highly threatened species is required.

Bibliography [top]

	Dransfield, J. and Beentje, H. 1995. The Palms of Madagascar. Royal Botanic Gardens Kew and The International Palm Society, Richmond. IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.2). Available at: http://www.iucnredlist.org. (Accessed: 17 October 2012). Rakotoarinivo, M. 2008. Analyse de la distribution et de la conservation des Palmiers (Arecaceae) de Madagascar par l'utilisation du systeme d'information geographique. Biologie et Ecologie Vegetale, University of Antananarivo.

Dransfield, J. and Beentje, H. 1995. The Palms of Madagascar. Royal Botanic Gardens Kew and The International Palm Society, Richmond.

IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.2). Available at: http://www.iucnredlist.org. (Accessed: 17 October 2012).

Rakotoarinivo, M. 2008. Analyse de la distribution et de la conservation des Palmiers (Arecaceae) de Madagascar par l'utilisation du systeme d'information geographique. Biologie et Ecologie Vegetale, University of Antananarivo.

Citation:	Rakotoarinivo, M. & Dransfield, J. 2012. Dypsis sahanofensis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 19 May 2013.
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