Minamijima Hirasea Snail (Hirasea minamijimana) 

The Minamijima Hirasea Snail was described in 1973 based on five specimens that were collected from probable Pleistocene deposits on the island of Minamijima, Ogasawara Islands, Japan. 

The shells reached sizes of about 0,56 to 0,64 cm in height; they were ashy white and their surface was ribbed by distantly placed rough growth lines. [1]

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I do not know for sure when this species actually disappeared, but I assume it to be a Pleistocene/Holocene border extinction.

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References:

[1] Tadashige Habe: Fossil land snails from Minami-jima, Bonin Islands. Science Reports of the Tohoku University, Special Volume 6 (Hatai Memorial Volume): 51-53. 1973

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edited: 11.05.2019