Opisthostoma decrespignyi (H. Adams, 1865)

De Crespigny’s karst snail



Taxonomy & Nomenclature

Synonym/s: Plectostoma decrespignii Adams, 1865; Opisthostoma decrespignii Adams, 1865


Conservation Status


Last record: 1960's or before?

IUCN RedList status: Critically Endangered (Possibly Extinct)



Labuan Island, off Sabah, Malaysia


Biology & Ecology










Original scientific description:

Adams, Henry. (1865a). Description of a new genus of land-shells from the island of Labuan, Borneo. Annals and Magazine of Natural History 15(3): 177.


Other references:

Adams, Henry. (1865b). Descriptions of a new genus and some new species of mollusks. Proceedings of the Zoological Society of London 1865: 753-755.

Blanford, W. T. (1867). On the Genus Plectostoma H. Adam, and the animal of Diplommatina Benson. The Annals and Magazine of Natural History, including Zoology, Botany and Geology 3(19): 305-307.

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.

Liew, Thor-Seng et al. (2014). A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina. ZooKeys 393: 1-107.

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

Schilthuizen, M. and Vermeulen, J. (2004). Opisthostoma decrespignyi. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. ( Downloaded on 24 July 2013.

Vermeulen, J. J. (1994). Notes on the non-marine molluscs of the island of Borneo. 6. The genus Opisthostoma (Gastropoda Prosobranchia: Diplommatinidae), part 2. Basteria 58: 75-191.


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