MolluscaBase taxon details
Helcionopsis depressum (Ulrich & Scofield, 1897) †
1737999 (urn:lsid:marinespecies.org:taxname:1737999)
accepted
Species
Platyceras depressum Ulrich & Scofield, 1897 † · unaccepted > superseded combination
marine, brackish, fresh, terrestrial
fossil only
(of Platyceras depressum Ulrich & Scofield, 1897 †) 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): 1069, pl. 61, fig. 55, 56 [details]
page(s): 1069, pl. 61, fig. 55, 56 [details]
Note USA, Minnesota, six miles south of Cannon Falls
Type locality USA, Minnesota, six miles south of Cannon Falls [details]
MolluscaBase eds. (2025). MolluscaBase. Helcionopsis depressum (Ulrich & Scofield, 1897) †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1737999 on 2025-09-12
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original description
(of Platyceras depressum Ulrich & Scofield, 1897 †) 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): 1069, pl. 61, fig. 55, 56 [details]
page(s): 1069, pl. 61, fig. 55, 56 [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Type locality USA, Minnesota, six miles south of Cannon Falls [details]
