MolluscaBase taxon details
original description
(of Metoptoma perovalis Whitfield, 1878 †) Whitfield, R. P. (1878). Preliminary descriptions of new species of fossils from the lower geological formations of Wisconsin. <em>Annual report of the Wisconsin Geological Survey for 1877.</em> 50-77. page(s): 74 [details]
basis of record
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 at https://www.biodiversitylibrary.org/page/14923788 page(s): 830, pl. LXXXII, fig. 3, 4 [details]
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