The Uneven Amastra Snail was described in 1917; it is known from (sub)fossil remains that had been recovered from Late Pleistocene/Early Holocene deposits near Ka’ūpūlehu, in Kona, Hawai’i.

The shells reached average sizes of 1,1 to 1,3 cm in height.

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References:

[1] C. Montague Cooke: Some new species of Amastra. Bishop Museum Occasional Papers 3(3): 1-34. 1917

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Photo from: ‘C. Montague Cooke: Some new species of Amastra. Bishop Museum Occasional Papers 3(3): 1-34. 1917’

(public domain)

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edited: 16.05.2022