Tag Archives: Charopidae

Sinployea aunuuana Solem

Aunuu Sinployea Snail (Sinployea aunuuana)

This species, which is restricted to the small island of ‘Aunu’u offshore Tutuila’s east coast in the American part of Samoa, was described in the year 1983.

The shell reaches an average size of 0,28 cm in diameter. [1]

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The island of ‘Aunu’u was investigated in intensive field studies in the year 2001, when the island was found to be infested with two alien snail species: the Two-toned Gulella (Huttonella bicolor (Hutton)), and the West African Streptostele Snail (Streptostele musaecola (Morelet)); both are known to be invasive, mainly snail-eating species, and both are found on many Pacific islands now.

The Aunuu Sinployea Snail was not found in 2001, and is now considered most likely extinct. [2]

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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
[2] Robert H. Cowie; Rebecca J. Rundell: The Land Snails of a small tropical island, Aunu’u, American Samoa. Pacific Science 56(2): 143-147. 2002

Sinployea clista Solem

Closed Sinployea Snail (Sinployea clista)

This species was described in the year 1983.

The ‘species’ occurs on the islands of Tutuila and ‘Upolu, the respective populations, however, differ from each other, and with certainty represent at least distinct subspecies, or possibly even species.

The shells reach sizes of about 0,21 to 0,29 cm in diameter. [1]

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The population of the island of ‘Upolu was not found again during field searches in the years from 1992 to 1994, and is now most probably wiped out. [2]

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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
[2] Robert H. Cowie; A. C. Robinson: The decline of native Pacific island faunas: changes in status of the land snails of Samoa through the 20th century. Biological Conservation 110: 55-65. 2003