MolluscaBase taxon details
Helcionopsis Ulrich & Scofield, 1897 †
1578872 (urn:lsid:marinespecies.org:taxname:1578872)
accepted
Genus
Helcionopsis striata Ulrich & Scofield, 1897 † (type by subsequent designation)
- Species Helcionopsis depressum (Ulrich & Scofield, 1897) †
- Species Helcionopsis radiatum (Lindström, 1884) †
- Species Helcionopsis reticulatus Easton, 1943 †
- Species Helcionopsis striata Ulrich & Scofield, 1897 †
- Species Helcionopsis subcarinata Ulrich & Scofield, 1897 †
- Species Helcionopsis wisconsinensis (Ulrich & Scofield, 1897) †
- Species Helcionopsis elegantulum Chapman, 1916 † accepted as Vallatotheca elegantula (Chapman, 1916) † (unaccepted > superseded combination)
- Species Helcionopsis eminens Perner, 1903 † accepted as Pilinopsis eminens (Perner, 1903) † (basionym)
- Species Helcionopsis nycteis (Billings, 1865) sensu Creswell, 1893 † accepted as Vallatotheca elegantula (Chapman, 1916) † (unaccepted > misapplication)
- Species Helcionopsis pinnaeformis Perner, 1903 † accepted as Archaeopraga pinnaeformis (Perner, 1903) †
- Species Helcionopsis praepostera Barrande, 1903 † accepted as Kotysium praepostera (Perner, 1903) † (unaccepted > superseded combination)
marine, brackish, fresh, terrestrial
fossil only
neuter
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): 821, 826 [details]
page(s): 821, 826 [details]
MolluscaBase eds. (2025). MolluscaBase. Helcionopsis Ulrich & Scofield, 1897 †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1578872 on 2025-04-24
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original description
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): 821, 826 [details]
basis of record Wahlman G.P. (1992). Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region. <em>United States Geological Survey Professional Paper.</em> 1066-O: 1-213.
page(s): 65 [details] Available for editors
[request]
page(s): 821, 826 [details]
basis of record Wahlman G.P. (1992). Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region. <em>United States Geological Survey Professional Paper.</em> 1066-O: 1-213.
page(s): 65 [details] Available for editors
[request]