Nomura, S., 1940. Molluscan Fauna of the Moniwa Shell Bed Exposed Along the Natori-Gawa in the Vicinity of Sendai, Miyagi Prefecture, Japan. Science Reports Of The Tohoku University, second ser.. 21 (1 ): 1 -46 .
New Species-Group Names:
- moniwaensis Nomura, 1940. p. 44. pl. II. f. 16.