MolluscaBase taxon details
Rissoina occulta Yokoyama, 1926 †
816532 (urn:lsid:marinespecies.org:taxname:816532)
accepted
Species
marine, brackish, fresh, terrestrial
fossil only
Yokoyama M. (1926). Fossil shells from Sado. <em>Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology.</em> 1(8): 249–312, pls. 32–37., available online at http://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0483_.pdf
page(s): 277; plate 34, fig. 12 [details] Available for editors
[request]
page(s): 277; plate 34, fig. 12 [details] Available for editors
[request]
MolluscaBase eds. (2025). MolluscaBase. Rissoina occulta Yokoyama, 1926 †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=816532 on 2025-09-11
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
original description
Yokoyama M. (1926). Fossil shells from Sado. <em>Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology.</em> 1(8): 249–312, pls. 32–37., available online at http://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0483_.pdf
page(s): 277; plate 34, fig. 12 [details] Available for editors [request]
additional source Makiyama, J. (1958). Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part II. <em>Palaeontological Society of Japan Special Papers.</em> 4: 1-6, pls. 25-57.
page(s): 5; plate 46, fig. 12 [details]
page(s): 277; plate 34, fig. 12 [details] Available for editors
[request]additional source Makiyama, J. (1958). Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part II. <em>Palaeontological Society of Japan Special Papers.</em> 4: 1-6, pls. 25-57.
page(s): 5; plate 46, fig. 12 [details]
Present Inaccurate Introduced: alien Containing type locality
