Laminated Disc Snail (Endodonta laminata)  

This species was described in 1866, it was restricted to an area that reached from Kahiliwai to Haena on the northern coast of Kaua’i, Hawaiian Islands.  

The Laminated Disc Snail was a quite large species, its shells reached an average size of about 0,6 to 0,65 cm in diameter. [1]  

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The species was not seen since the beginning of the 20th century and is very certainly extinct. [2]  

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References:  

[1] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part I, Family Endodontidae. Field Museum of Natural History Chicago, Illinois 1976 
[2] Norine W. Yeung; Kenneth A. Hayes: Update on the status of the remaining Hawaiian land snail species Part 4: Punctidae and Endodontidae. 2016  

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edited: 23.03.2017