Grabham’s Amphorella Snail (Amphorella grabhami)  

This species is known from deposits as old as the Middle Pleistocene, it survived until the Late Holocene, the youngest specimens can be dated to an age of around 50 years, meaning this species disappeared, completely unnoticed, around the 1950s. [1]

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References:

[1] Glenn A. Goodfriend; R. A. D. Cameron; L. M. Cook: Fossil evidence of recent human impact on the land snail fauna of Madeira. Journal of Biogeography 21: 309-320. 1994

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edited: 16.06.2020