The Land Snails of a Small Tropical Pacific Island Aunu'u, American Samoa

Abstract

Survey work on the American Samoan island of Aunu'u, a small island off the eastern end of Tutuila, combined with review of museum collections, increased the known land snail fauna of the island from 2 to 22 species. Of these species, 12 are native to the Samoan Archipelago, nine are introduced, and one is cryptogenic (of unknown origin). The fauna is a subset of that of the main American Samoan island of Tutuila, although it also includes one species endemic to Aunu'u but now extinct.