T.  Shuto, ?New Oligocene turrids from north Kyushu.?, Japanese Journal of Geology and Geography, vol. 34, no. 1, pp. 1-17, pl 1, 1963.

T.  Shuto, ?Conacean gastropods from the Miyazaki Group (Palaeontological study of the Miyazaki Group-IX)?, Mem. Fac. Sci., Kyushu Univ., Ser. D, vol. 9, no. 2, pp. 71-150, pis. 3-10., 1961.