|Scientific Name:||Dypsis rivularis|
|Species Authority:||(Jum. & H.Perrier) Beentje & J.Dransf.|
Chrysalidocarpus rivularis Jum. & H.Perrier
|Red List Category & Criteria:||Endangered B2ab(ii,iii,v); C2a(i); D ver 3.1|
|Assessor(s):||Rakotoarinivo, M. & Dransfield, J.|
|Reviewer(s):||Baker, W.J., Beentje, H.J. & Bachman, S.|
Known from seven localities between Daraina and Ankarafantsika in the northwest but the population is severely fragmented and the area of occupancy for this species is estimated to be only 457 km². Almost all of the known sites are not protected and are subject to clearance, reducing the quality and extent of the habitat and probably reducing the population which is now estimated as 100 mature individuals. Based on this information this species qualifies for listing as Endangered.
|Previously published Red List assessments:|
|Range Description:||Endemic to northwest Madagascar where it occurs between Marovoay and Ambilobe.|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The total population is estimated to contain fewer than 100 individuals and is decreasing.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||Occurs in riverine forest. The species frequently grows on stream edges, among boulders at altitudes between 100 and 700 m.|
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Use and Trade:||There is no information on use of this species.|
|Major Threat(s):||The main threat to this species is habitat loss through clearance for shifting agriculture and logging.|
|Conservation Actions:||Protected in Ankarafantsika and Manongarivo.|
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).
|Citation:||Rakotoarinivo, M. & Dransfield, J. 2012. Dypsis rivularis. The IUCN Red List of Threatened Species 2012: e.T38560A2879255.Downloaded on 23 June 2017.|
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