MolluscaBase name details
original description
Otuka, Y. (1949) Fossil Mollusca and rocks of the Kiyosumi Group exposed at Minato-machi, Chiba Prefecture, and its environs. Japanese Journal of Geology and Geophysics, 21, 295–309, pl. 13.
page(s): 307, pl. 13 fig. 18 [details]