Traits taxon details
original description
(of Cyrena otsukai Yabe & Nagao, 1926 †) Yabe, H.; Nagao, T.; Shimizu, S. (1926). Cretaceous Mollusca from the Sanchû-Graben in the Kwantô Mountainland, Japan. <em>Science reports of the Tohoku Imperial University. 2nd series, Geology.</em> 9(3): 33-76., available online at http://hdl.handle.net/10097/30201 page(s): 50-51, pl. 13, figs 20-24 [details] Available for editors 
basis of record
Matsukawa, M.; Ito, M.; Hayashi, K.; Takahashi, O.; Yang, S.Y.; Lim, S.K. (1998). Evaluations of Nonmarine Bivalves as Chronological Indices, Based on Examples From The Lower Cretaceous of East Asia. In: Lucas, S.G.; Kirkland, J.I.; Estep, J.W. (eds) Lower and Middle Cretaceous Terrestrial Ecosystems. <em>New Mexico Museum of Natural History and Science, Bulletin.</em> 14: 125-133. [details] Available for editors 
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