Conical Amastra Snail (Amastra conica)
The Conical Amastra Snail was described 1906, it was endemic to the Hamakua Distict in the northern part of Hawai’i, Hawaiian Islands.
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“Shell fossil, dextral, minutely perforated, thin, elongately conical, apex acute; surface sculptured with fine growth-lines, apical whorls raidiately sulcated. Color of living shell unknown.” [1]
This species apparently disappeared already at the beginning of the Holocene era.
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References:
[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911
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(public domain)
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edited: 15.06.2020