Chilonopsis nonpareil (Perry, 1811)

Great St. Helena awl snail



Taxonomy & Nomenclature



Conservation Status


Last record: pre-1875 (Pryce & White, 2014)

IUCN RedList status: Extinct



St. Helena


Biology & Ecology










Original scientific description:

Perry, G. (1811). Conchology, or the natural history of shells: containing a new arrangement of the genera and species. W. Miller. London. 4 + [61] + [1] pp.. 61 pis. [automatic download]


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.

Melliss, John Charles. (1875). St Helena: A physical, historical and topographical description of the Island including its geology, fauna, flora and meteorology. London: Reeve. x + 426 pp.

Pryce, D. and White, L. (2014). Chilonopsis nonpareil. The IUCN Red List of Threatened Species. Version 2014.3. ( Downloaded on 22 November 2014.

Pryce, D. & White, L. 2014. Chilonopsis nonpareil. The IUCN Red List of Threatened Species 2014: e.T4639A64303734. Accessed on 02 July 2022.

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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