Guam Amber Snail (Succinea guamensis)

The Guam Amber Snail was described in 1857, it is thought to be endemic to the island of Guam, Mariana Islands.

The species appears to be extinct now.

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According to another source this species is said to also inhabit Koror, Palau Islands as well as the island of Pohnpei in the Federated States of Micronesia, the specimens collected from there, however, are somewhat smaller that those from Guam. [1]

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References:

[1] O. F. von Moellendorff: The land shells of the Caroline Islands. Journal of Malacology 7: 101-126. 1900

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edited: 26.11.2018