MolluscaBase source details
Pilsbry, H. A. (1899). Polygyra richardsoni var. lingualis n. var. The Nautilus. 12(12): 144.
412774
Pilsbry, H. A.
1899
<i>Polygyra richardsoni</i> var. <i>lingualis</i> n. var.
The Nautilus
12(12): 144
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Polygyra richardsoni var. lingualis Pilsbry, 1899 accepted as Linisa richardsoni (E. von Martens, 1892) (original description)