Palau Aaadonta Disc Snail (Aaadonta pelewana)  

The Palau Aaadonta Disc Snail was described in 1976 based on several (seven, as far as I’m aware) shells that had been found somewhere (the exact locality is not known) on the Palau Islands some 70 years ago (an exact date is not known to me).  

The shells of this tiny species reached a size of only about 0,28 cm in diameter. [1]  

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According to David Bullis (pers. comm.), who studies this genus in Palau, this species has indeed never been found since the type collection and may indeed be extinct, in my opinion it should best be referred to as ‘Data Deficient’.  

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References:  

[1] A. Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976  

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edited: 10.05.2019