Binary Disc Snail (Endodonta binaria)
The Binary Disc Snail, which was described in 1856, was endemic to the island of Kaua’i, Hawaiian Islands. The shells on average reached a size of 0,43 cm in diameter. [1]
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This species is now most likely extinct, like nearly all of its congeners. [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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(not in copyright)
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edited: 23.03.2017