Ulrich, E. O.; Scofield, W. H. (1897). The Lower Silurian Gastropoda of Minnesota. <em>The Geology of Minnesota.</em> 3(2): 813-1081, pls. 61-82., available online athttps://www.biodiversitylibrary.org/page/14923788 page(s): 861, pi. 62, figs. 30, 31 [details]
MolluscaBase eds. (2024). MolluscaBase. Cyrtolites ornatus var. minor Ulrich & Scofield, 1897 †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1720103 on 2024-04-29
original descriptionUlrich, E. O.; Scofield, W. H. (1897). The Lower Silurian Gastropoda of Minnesota. <em>The Geology of Minnesota.</em> 3(2): 813-1081, pls. 61-82., available online athttps://www.biodiversitylibrary.org/page/14923788 page(s): 861, pi. 62, figs. 30, 31 [details]
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