|Scientific Name:||Pachnodus oxoniensis|
|Species Authority:||Gerlach, 1994|
|Red List Category & Criteria:||Critically Endangered B1ab(iii)+2ab(iii) ver 3.1|
|Reviewer(s):||Miller, R.M., Pollock, C.M. & Seddon, M.B.|
This species is restricted to a very small range; its EOO and AOO are both estimated to be 3 km², and it is found in only 1 location. Within this area the population is stable, but vulnerable to habitat deterioration and habitat change resulting from climate change (changes in rainfall patterns), as well as ongoing habitat degradation caused by the impacts of invasive alien plant species (e.g., Cinnamomum verum).
|Range Description:||A Seychelles endemic, this snail is known only from Silhouette island and has an estimated extent of occurrence (EOO) and area of occupancy (AOO) of just 3 km².|
Native:Seychelles (Seychelles (main island group))
|Estimated area of occupancy (AOO) - km2:||3|
|Continuing decline in area of occupancy (AOO):||No|
|Extreme fluctuations in area of occupancy (AOO):||No|
|Estimated extent of occurrence (EOO) - km2:||3|
|Continuing decline in extent of occurrence (EOO):||No|
|Extreme fluctuations in extent of occurrence (EOO):||No|
|Number of Locations:||1|
|Continuing decline in number of locations:||No|
|Extreme fluctuations in the number of locations:||No|
|Lower elevation limit (metres):||450|
|Upper elevation limit (metres):||774|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Population estimates showed 423,000 individuals in 2005.|
|Current Population Trend:||Stable|
|Habitat and Ecology:||This is an arboreal species restricted to high moss forest, above 450 m.|
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Major Threat(s):||Pachnodus oxoniensis is vulnerable to habitat deterioration and habitat change resulting from climate change (changes in rainfall patterns), as well as habitat degradation caused by the impacts of invasive alien species (e.g., Cinnamomum verum).|
|Conservation Actions:||No conservation measures are in place. The forest areas of Silhouette should be protected, and invasive species must be controlled throughout the Seychelles.|
Gerlach, J. 2006. Terrestrial and Freshwater Mollusca of the Seychelles Islands. Backhuys, Leiden.
Gerlach, J., Matyot, P. and Samways, M.J. 2005. Developing strategies for invertebrate conservation, the case of the Seychelles islands. Phelsuma: 9-12.
IUCN. 2009. IUCN Red List of Threatened Species (ver. 2009.2). Available at: www.iucnredlist.org. (Accessed: 3 November 2009).
|Citation:||Gerlach, J. 2009. Pachnodus oxoniensis. The IUCN Red List of Threatened Species 2009: e.T168119A6454126. . Downloaded on 04 May 2016.|
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