This species was described in 1872; it was endemic to the island of Rarotonga, Cook Islands and was considered: “A common species found on the ground in a mountain ravine.“. [1]
The shells reach sizes of 0,37 to 0,51 cm in diameter; they are: “Moderatley, deeply umbilicated, thin, subpellucid, ash-colored under a brownish corneous epidermis, decorticated in adults, rarely strigated with chestnut, arcuately costate, the interstices very lightly striated, suture channeled; whorls 5, convex, slowly increasing, the last deflected above, rounded below, periphery obsoletely angulated.“. [2]
The species is now 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] G. W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887
[3] 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