The IUCN Red List of Threatened Species™
ISSN 2307-8235 (online)
IUCN 2008: T195924A2433127
Ravenea hypoleuca
Assessment by: Rakotoarinivo, M. & Dransfield, J.
View on www.iucnredlist.org
Citation: Rakotoarinivo, M. & Dransfield, J. 2012. Ravenea hypoleuca. The IUCN Red List of
Threatened Species 2012: e.T195924A2433127.
http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T195924A2433127.en
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THE IUCN RED LIST OF THREATENED SPECIES™
Taxonomy
Kingdom
Phylum
Class
Order
Family
Plantae
Tracheophyta
Liliopsida
Arecales
Palmae
Taxon Name: Ravenea hypoleuca Rakotoarin. & J.Dransf.
Assessment Information
Red List Category & Criteria:
Critically Endangered B1ab(iii)+2ab(iii); D ver 3.1
Year Published:
2012
Date Assessed:
December 17, 2010
Justification:
This rare palm is only known from Vondrozo and Tsitongambarika forests where fewer than 40 mature
individuals have been seen in an extent of occurrence and area of occupancy of 8 km². Current threats
are mostly related to habitat loss and degradation due to timber extraction which are resulting in a
continuing decline. The species is therefore listed as Critically Endangered.
Geographic Range
Range Description:
Endemic to southeast Madagascar where it in known only from the Vondrozo and Tsitongambarika
(Taolagnaro) forests.
Country Occurrence:
Native: Madagascar
© The IUCN Red List of Threatened Species: Ravenea hypoleuca – published in 2012.
http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T195924A2433127.en
1
Distribution Map
© The IUCN Red List of Threatened Species: Ravenea hypoleuca – published in 2012.
http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T195924A2433127.en
2
Population
About 40 mature individuals have been observed at the two sites. The population trend is unknown.
Current Population Trend: Unknown
Habitat and Ecology (see Appendix for additional information)
Grows in lowland humid forest, on valley bottoms or lower slopes, within a narrow altitudinal range of
550 to 600 m.
Systems: Terrestrial
Use and Trade
There is no information on use of this species.
Threats (see Appendix for additional information)
The main threat to this species is habitat loss through clearance for shifting agriculture and logging.
Conservation Actions (see Appendix for additional information)
The species is not known to occur in any protected area. Conservation action is urgently needed for this
species.
Credits
Assessor(s):
Rakotoarinivo, M. & Dransfield, J.
Reviewer(s):
Baker, W.J., Beentje, H.J. & Bachman, S., Baker, W.J. & Beentje, H.J.
© The IUCN Red List of Threatened Species: Ravenea hypoleuca – published in 2012.
http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T195924A2433127.en
3
Bibliography
IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.2). Available at: http://www.iucnredlist.org.
(Accessed: 17 October 2012).
Rakotoarinivo, M. and Dransfield, J. 2010. New species of Dypsis and Ravenea (Arecaceae) from
Madagascar. Kew Bulletin 65: 279-303.
Citation
Rakotoarinivo, M. & Dransfield, J. 2012. Ravenea hypoleuca. The IUCN Red List of Threatened Species
2012: e.T195924A2433127. http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T195924A2433127.en
Disclaimer
To make use of this information, please check the Terms of Use.
External Resources
For Images and External Links to Additional Information, please see the Red List website.
© The IUCN Red List of Threatened Species: Ravenea hypoleuca – published in 2012.
http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T195924A2433127.en
4
Appendix
Habitats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Habitat
Season
Suitability
Major
Importance?
1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
-
Suitable
-
Threats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Threat
Timing
Scope
Severity
Impact Score
2. Agriculture & aquaculture -> 2.1. Annual &
perennial non-timber crops -> 2.1.1. Shifting
agriculture
Ongoing
-
-
-
Stresses:
1. Ecosystem stresses -> 1.1. Ecosystem conversion
1. Ecosystem stresses -> 1.2. Ecosystem degradation
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)
-
-
Conservation Actions in Place
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Conservation Actions in Place
In-Place Land/Water Protection and Management
Occur in at least one PA: No
Conservation Actions Needed
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Conservation Actions Needed
1. Land/water protection -> 1.1. Site/area protection
4. Education & awareness -> 4.3. Awareness & communications
Research Needed
(http://www.iucnredlist.org/technical-documents/classification-schemes)
© The IUCN Red List of Threatened Species: Ravenea hypoleuca – published in 2012.
http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T195924A2433127.en
5
Research Needed
3. Monitoring -> 3.1. Population trends
3. Monitoring -> 3.4. Habitat trends
Additional Data Fields
Distribution
Estimated area of occupancy (AOO) (km²): 8
Estimated extent of occurrence (EOO) (km²): 8
Number of Locations: 1
Lower elevation limit (m): 550
Upper elevation limit (m): 600
Population
Number of mature individuals: 40
Population severely fragmented: No
Habitats and Ecology
Continuing decline in area, extent and/or quality of habitat: Yes
© The IUCN Red List of Threatened Species: Ravenea hypoleuca – published in 2012.
http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T195924A2433127.en
6
The IUCN Red List Partnership
The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species
Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN
Red List Partners are: BirdLife International; Botanic Gardens Conservation International; Conservation
International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas
A&M University; Wildscreen; and Zoological Society of London.
THE IUCN RED LIST OF THREATENED SPECIES™