|Scientific Name:||Pachnodus velutinus (Pfeiffer, 1841)|
|Red List Category & Criteria:||Extinct ver 3.1|
|Reviewer(s):||Miller, R.M., Pollock, C.M. & Seddon, M.B.|
Range contraction in this species has been recorded since 1972, following range expansion by Pachnodus niger which eventually led to hybridization. Hybrids exhibited a selective advantage in being tolerant of dry conditions; P. velutinus required constant humidity levels in excess of 90%. In 1994, no true P. velutinus could be located and since that date its range has been occupied exclusively by P. niger x velutinus hybrids.
|Previously published Red List assessments:|
|Range Description:||Endemic to the Seychelles, this extinct snail was found only on Mahé island.|
Regionally extinct:Seychelles (Seychelles (main island group))
|Range Map:||Click here to open the map viewer and explore range.|
|Habitat and Ecology:||This snail once inhabited high forests, requiring constant humidity levels in excess of 90%. By the early 1990s, it was restricted to the dampest area of moss forests, and by 1994 it had become extinct.|
|Major Threat(s):||Being vulnerable to dessication, this species was historically threatened by habitat degradation and climatic changes. Hybridization with Pachnodus niger led to the extinction of this species in 1994.|
|Conservation Actions:||This snail was historically present in the Morne Seychellois National Park.|
Gerlach, J. 1996. Patterns of hybridization and extinction in a tropical land snail. Phelsuma 6: 27-42.
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 velutinus. The IUCN Red List of Threatened Species 2009: e.T40091A10304648.Downloaded on 23 October 2017.|
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