This species was described in 1872; it was endemic to the island of Rarotonga,Cook Islands, where it apparently was quite common and widespread; A. J. Garrett, the author of the species, gave the following information about it.:
“A common species lurking under stones and among rotten wood. It was found in several villages.” [1]
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The shells reach an average size of about 0,35 cm in diameter.
The Rarotongan Sinployea Snail was not recorded since the mid-1800s and thus is considered extinct. [2]
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References:
[1] Andrew J. Garrett: Descriptions of new species of land and fresh-water shells. American Journal of Conchology 7: 219-230. 1872
[2] Fred J. Brook: Coastal landsnail fauna of Rarotonga, Cook Islands: systematics, diversity, biogeography, faunal history, and environmental influences. Tuhinga 21: 161-252. 2010
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Depiction from: ‘G. W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887’
(not in copyright)
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edited: 02.08.2022