MolluscaBase name details
original description
Yokoyama M. (1926). Tertiary Mollusca from southern Tôtômi. <em>Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology.</em> 1(9): 313–364, pls. 38–41., available online at http://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0484_.pdf [details]