<i>Pisidium obtusale</i> Pfeiffer. From Illustrated Index of British Shells, Plate VI., Fig 21.
<bdi><a href="https://en.wikipedia.org/wiki/en:George_Brettingham_Sowerby_II" class="extiw" title="w:en:George Brettingham Sowerby II"><span title="British naturalist, illustrator, and conchologist; G.B. Sowerby II (1812–1884)">George Brettingham Sowerby II</span></a>
</bdi>
1859
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