M.  Tamura, ?Taxodonta and Isodonta from the Jurassic Soma Group in north Japan?, Trans. Proc. Palaeont. Soc. Japan, N. S., vol. 36, pp. 168-180, 1959.

M.  Tamura, ?Taxodonta and Isodonta from the Jurassic Soma Group in north Japan?, Trans. Proc. Palaeont. Soc. Japan, N. S., vol. 36, pp. 168-180, 1959.