Trochochlamys ogasawarana (Pilsbry, 1902:31)



Taxonomy & Nomenclature

Synonym/s: Kaliella ogasarawana Pilsbry, 1902:31 (original combination); Euconulidae ogasarawana (Pilsbry, 1902:31)


Originally described as Kaliella ogasarawana (Ibid.). Treated under Trochochlamys by (Azuma, 1982: 168), but under Euconulidae by others (B. Roth, Pers. comm. October 2012 to S. Thorpe). Ogasawarana ogasawarana Pilsbry, 1902 is also a possible synonym of this species.


Conservation Status


Last record: 1939

IUCN RedList status: Critically Endangered



Hahajima, Ogasawara Islands, Japan


Type specimen/series was collected from Hahajima (Pilsbry, 1902: 31).


Biology & Ecology










Original scientific description:

Pilsbry, Henry Augustus. (1902). New land Mollusca from Japan and the Bonin Islands. Proceedings of the Academy of Natural Sciences, Philadelphia 54: 25-32.


Other references:

Azuma, Masao. (1982). Colored Illustrations of the Land Snails of Japan. Osaka: Hoikusha Publ. Co. [p. 168, fig. 299 (color photo of shell)]

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.

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

Tomiyama, K. (1996). Trochochlamys ogasawarana. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. ( Downloaded on 27 July 2013.


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