Sowerby, G. B. II. (1870). Descriptions of forty-eight new species of shells. <em>Proceedings of the Zoological Society of London.</em> 1870: 249-259 [November]., available online athttps://www.biodiversitylibrary.org/page/28555089[details]
MolluscaBase eds. (2021). MolluscaBase. Typhis duplicatus G. B. Sowerby II, 1870. Accessed at: http://molluscabase.org/aphia.php?p=taxdetails&id=407651 on 2024-04-20
original descriptionSowerby, G. B. II. (1870). Descriptions of forty-eight new species of shells. <em>Proceedings of the Zoological Society of London.</em> 1870: 249-259 [November]., available online athttps://www.biodiversitylibrary.org/page/28555089[details]