The Otarea Sinployea Snail was described in 1872; the species was endemic to the island of Rarotonga, Cook Islands.
“This species is confined to a single valley, where I found it abundantly, under dead wood on the banks of a stream. Living examples are uniform deep black.“. [1]
The shells reached sizes of up to 0,52 cm in diameter. [2]
The species is now clearly extinct.
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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] Alan Solem: Endodontoid land snails from Pacific Islands (Mollusca: Pulmonata: Sigmurethra). Part II, Families Punctidae and Charopidae, Zoogeography. Field Museum of Natural History Chicago, Illinois 1983
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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