A collection of fossil shells of the genus Pisidium sampled in late glacial fluvio-lacustrine deposits in the Rift Valley, Ethiopia, contains four species of Palaearctic origin and two (or perhaps three) African species.

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Zoologische Mededelingen

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Naturalis journals & series

Kuiper, J. G. J. (2009). Fossil records of Palaearctic Pisidium species in tropical Africa (Bivalvia, Sphaeriidae). Zoologische Mededelingen, 83(10), 593–594.