Plane-spired Sinployea Snail (Sinployea planospira)
This species was described in 1881; it was restricted to the island of Rarotonga, Cook Islands.
The shells reach sizes of 0,34 to 0,43 cm in diameter.
The species is now extinct.
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References:
[1] 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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edited: 02.08.2022