MolluscaBase name details
Cyclas formosa Meek & Hayden, 1856 †
1502811 (urn:lsid:marinespecies.org:taxname:1502811)
unaccepted > superseded combination
Species
Cyclas Lamarck, 1798 accepted as Sphaerium Scopoli, 1777
fossil only
Meek, F.B.; Hayden, F.V. (1856). Descriptions of New Species of Acephala and Gastropoda, from the Tertiary formations of Nebraska Territory, with some general remarks on the Geology of the country about the sources of the Missouri River. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 8: 111-126., available online at https://www.biodiversitylibrary.org/page/1935165
page(s): 115 [details]
page(s): 115 [details]
Holotype USNM 2125
, Note "Three miles above Fort Union", North Dakota,...
Holotype USNM 2125 [details]
Type locality "Three miles above Fort Union", North Dakota, USA; Fort Union Fm., Paleocene [details]
MolluscaBase eds. (2025). MolluscaBase. Cyclas formosa Meek & Hayden, 1856 †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1502811 on 2025-09-11
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original description
Meek, F.B.; Hayden, F.V. (1856). Descriptions of New Species of Acephala and Gastropoda, from the Tertiary formations of Nebraska Territory, with some general remarks on the Geology of the country about the sources of the Missouri River. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 8: 111-126., available online at https://www.biodiversitylibrary.org/page/1935165
page(s): 115 [details]
page(s): 115 [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype USNM 2125 [details]
From editor or global species database
Type locality "Three miles above Fort Union", North Dakota, USA; Fort Union Fm., Paleocene [details]
