original description
Nagao, T. (1928). Palaeogene fossils of the island of Kyûshû, Japan. Part I. <em>Science reports of the Tohoku Imperial University. 2nd series, Geology.</em> 9(3): 97-128, pls. 18-22.
page(s): 122, pl. 17, figs 11-13, pl. 21, fig. 13 [details] Available for editors [request]
From editor or global species database
Type locality "The Lower Orthaulax japonicus Zone; Ipponmatsu, Ginsui-mura, province of Chikugo; Takesaki, Kôyagi-jima, province of Hizen [...]. The Upper Orthaulax japonicus Zone; Ôura, Ômuta city, province of Chikugo" (Kyushu, Japan) [details]