Tag Archives: Helix complementaria (Mousson)

Sinployea complementaria (Mousson)

Complementary Sinployea Snail (Sinployea complementaria)

This species was described in 1865; it was restricted to the island of ‘Upolu, Samoa.

The shells reach sizes of 0,43 to 0,59 cm in diameter, making it one of the largest members of its genus; they are: “Rather narrowly umbilicated, rugose, striate-costulate, with curved-back radiations of white and grayish corneous, suture subimpressed; whorls 5, slowly increasing, the last not descending, oblique, obtusely subangulated, flatly rounded below; right margin of peristome subincurved.” [1]

The species wasn’t found during recent surveys and might well be extinct.

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References:

[1] G. W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second Series: Pulmonata Vol. 3, Helicidae Vol. 1. 1887
[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