Pachnodus ladiguensis Gerlach, 2003



Taxonomy & Nomenclature

Synonym/s: Pachnodus sp. (Griffiths & Gerlach 1991:7);  Pachnodus ‘La Digue’  (Gerlach 1997:45)


Conservation Status


Last record: subfossil (mid-1800's?)

IUCN RedList status: Extinct



La Digue island, Seychelles


Biology & Ecology










Original scientific description:

Gerlach, Justin. (2003). New terrestrial Gastropoda (Mollusca) from Seychelles. Phelsuma 11: 39-51.


Other references:

Cowie, Robert H., Régnier, Claire, Fontaine, Benoît, and Bouchet, Philippe. (2017). Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41.

Gerlach, Justin (ed.). (1997). Seychelles Red Data Book 1997.  Seychelles: NPTS.

Gerlach, J. 2003. New terrestrial Gastropoda (Mollusca) from Seychelles. Phelsuma 11: 39-51.

Gerlach, J. 2006. Terrestrial and Freshwater Mollusca of the Seychelles Islands. Backhuys, Leiden.

Gerlach, J. (2009a). Pachnodus ladiguensis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. ( Downloaded on 10 November 2012.

Gerlach, J. 2009b. Pachnodus ladiguensis. The IUCN Red List of Threatened Species 2009: e.T168112A6451870. Downloaded on 23 June 2021.

Gerlach, Justin. (2012). Red Listing reveals the true state of biodiversity: a comprehensive assessment of Seychelles biodiversity. Phelsuma 20: 9-22.

Gerlach, Justin. (2013). Biogeography of the terrestrial and freshwater biota of the Seychelles islands. Phelsuma 21: 27-44.

Gerlach, Justin, Matyot, Pat and Samways, Michael J. (2005). Developing strategies for invertebrate conservation: the case for the Seychelles islands. Phelsuma 13: 9-24.

Griffiths, O. L. & Gerlach, Justin. (1991). New records of snails from the islands of La Digue and Praslin (Seychelles). Papustyla 91(1): 5-7.

Régnier, Claire, Fontaine, Benoît and Bouchet, Philippe. (2009). Not Knowing, Not Recording, Not Listing: Numerous Unnoticed Mollusk Extinctions. Conservation Biology 23(5): 1214-1221.


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