Dypsis sahanofensis 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Arecales Palmae

Scientific Name: Dypsis sahanofensis
Species Authority: (Jum. & H.Perrier) Beentje & J.Dransf.
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
Date Assessed: 2010-12-17
Assessor(s): Rakotoarinivo, M. & Dransfield, J.
Reviewer(s): Baker, W.J., Beentje, H.J. & Bachman, S., Baker, W.J. & Beentje, H.J.
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.
Previously published Red List assessments:
1998 Endangered (EN)
1998 Endangered (E)

Geographic Range [top]

Range Description: Endemic to Madagascar. Known from submontane and montane forest on the eastern escarpment, between Ambositra and Ampasimanolotra.
Countries occurrence:
Estimated area of occupancy (AOO) - km2: 45
Number of Locations: 4
Lower elevation limit (metres): 300
Upper elevation limit (metres): 1400
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.
Current Population Trend: Unknown
Additional data:
Number of mature individuals: 40
Population severely fragmented: Yes

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
Continuing decline in area, extent and/or quality of habitat: Yes

Use and Trade [top]

Use and Trade: There is no information on use of this species.

Threats [top]

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.

Classifications [top]

1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
suitability: Suitable  
1. Forest -> 1.9. Forest - Subtropical/Tropical Moist Montane
suitability: Suitable  
1. Land/water protection -> 1.1. Site/area protection
2. Land/water management -> 2.1. Site/area management

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education
2. Agriculture & aquaculture -> 2.1. Annual & perennial non-timber crops -> 2.1.1. Shifting agriculture
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

5. Biological resource use -> 5.3. Logging & wood harvesting -> 5.3.3. Unintentional effects: (subsistence/small scale)
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

3. Monitoring -> 3.1. Population trends
3. Monitoring -> 3.4. Habitat trends

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: (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. The IUCN Red List of Threatened Species 2012: e.T38561A2879357. . Downloaded on 01 December 2015.
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