The Lymnaeidae of North and Middle America. Recent and Fossil
Journal/Book Name, Vol. No.:
The Chicago Academy of Sciences, Special Publication no. 3
Available online at https://biodiversitylibrary.org/page/34729566
The type of Lymnaea stagnalis jugularis Say, 1817 cannot be found, but it was "doutless founded on immature material" (Baker, 1911: p. 148)
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