MolluscaBase name details
Cyrena verecunda Yokoyama, 1932 †
1519013 (urn:lsid:marinespecies.org:taxname:1519013)
unaccepted > superseded combination
Species
marine, fresh, terrestrial
fossil only
Yokoyama M. (1932). Tertiary Mollusca from the Coalfield of Uryu, Ishikari. <em>Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology.</em> 3(6): 221-247., available online at http://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0503_.pdf
page(s): 242, pl. 3, fig. 5 [details] Available for editors
[request]
page(s): 242, pl. 3, fig. 5 [details] Available for editors
[request]
Note "Lower Morokoshi Beds: In the Shimodazawa as...
From editor or global species database
Type locality "Lower Morokoshi Beds: In the Shimodazawa as well as in the Urashizawa, both tributaries of Shisengawa" (Hokkaido, Japan) [details]
Stratigraphy From the Lower Morokoshi Beds, probably Eocene or Oligocene in age (absolute age uncertain).
Stratigraphy From the Lower Morokoshi Beds, probably Eocene or Oligocene in age (absolute age uncertain). [details]
MolluscaBase eds. (2025). MolluscaBase. Cyrena verecunda Yokoyama, 1932 †. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=1519013 on 2025-09-10
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original description
Yokoyama M. (1932). Tertiary Mollusca from the Coalfield of Uryu, Ishikari. <em>Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology.</em> 3(6): 221-247., available online at http://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0503_.pdf
page(s): 242, pl. 3, fig. 5 [details] Available for editors [request]
source of synonymy Ôtatume, K. (1943). The Fossil Corbiculids from Hokkaidô and Karahuto. <em>The Journal of the Geological Society of Japan.</em> 50(599): 216-222., available online at https://doi.org/10.14825/prpsj1935.1943.287
page(s): 217 [details] Available for editors [request]
page(s): 242, pl. 3, fig. 5 [details] Available for editors
[request]source of synonymy Ôtatume, K. (1943). The Fossil Corbiculids from Hokkaidô and Karahuto. <em>The Journal of the Geological Society of Japan.</em> 50(599): 216-222., available online at https://doi.org/10.14825/prpsj1935.1943.287
page(s): 217 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Stratigraphy From the Lower Morokoshi Beds, probably Eocene or Oligocene in age (absolute age uncertain). [details]Synonymy Considered a synonym of Corbicula atrata tokudai (Yokoyama, 1932) by Ôtatume (1943). [details]
Type locality "Lower Morokoshi Beds: In the Shimodazawa as well as in the Urashizawa, both tributaries of Shisengawa" (Hokkaido, Japan) [details]
