original description(ofCyclotus amethystinus Guppy, 1868)Guppy, R. J. L. (1868). On the terrestrial mollusks of Dominica and Grenada, with an account of some new species from Trinidad. <em>Annals and Magazine of Natural History.</em> (4) 1: 429-442., available online athttps://biodiversitylibrary.org/page/22248819 page(s): 433; note: With two varieties [details]
basis of recordBland, T. (1869). Notes on the land-shells of Trinidad, Grenada and Dominica, and also of Curacao and Buen Ayre, W. I. <em>American Journal of Conchology.</em> 4(4): 177-192., available online athttps://www.biodiversitylibrary.org/page/16070286 page(s): 190 [details]
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