Conturbatia Snail (Conturbatia crenata)
This small snail species was described in 2001; it is known only from the Île de Frégate in the Seychelles.
The species was described after its apparent extinction; the last life individuals were seen in the year 2000 and it is believed that this species, who feeds on carrion, inadvertently fell victim to a rat eradication program that used poisoned baits to kill invasive rats.
There is, however, a slight chance that a tiny population might have survived, hidden somewhere and yet unseen.
*********************
edited: 19.08.2022