Thick-lipped Hahajima Lamprocystis Snail (Lamprocystis hahajimana ssp. pachychilus)
The Hahajima Lamprocystis Snail is apparently endemic to the island of Hahajima in the Ogasawara Islands, Japan, it can be split into at least five subspecies of which the one discussed here, appears to be extinct.
No further information is available so far.
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edited: 12.06.2020
Dead as the Dodo – Holocene Extinctions
… about 5858 taxa have disappeared since the beginning of the Anthropocene era (since about 10000 BCE)
