MolluscaBase source details
Pilsbry, H. A. (1901). Polygyra thyroides sanctisimonis n. var. The Nautilus. 15(1): 8.
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Pilsbry, H. A.
1901
<i>Polygyra thyroides sanctisimonis</i> n. var.
The Nautilus
15(1): 8
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Polygyra thyroides var. sanctisimonis Pilsbry, 1901 accepted as Mesodon thyroidus (Say, 1817) (original description)
