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Science 1 April 1966:
Vol. 152. no. 3718, pp. 71 - 72
DOI: 10.1126/science.152.3718.71
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Articles

Polymorphism in Pleistocene Land Snails

D. F. Owen 1

1 Department of Zoology, Makerere University College, Kampala, Uganda

Under suitable conditions the colors and patterns of the shells of land snails may be preserved for thousands of years. In a late Pleistocene population of Limicolaria martensiana all the major color forms that occur in modern living snails may be distinguished, and the basic polymorphism is at least 8,000 to 10,000 year old.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)