検索結果（標本）

Ormoceras japonicum Niko   Holotype

Niko, S., 1990a   p. 595, figs. 2-1–4; 3-6

Paleozoic | Mollusca : Cephalopoda

Material Reports, no. 33, p. 39.

Ormoceras japonicum Niko   Paratype

Niko, S., 1990a   p. 595, fig. 2-5,6

Paleozoic | Mollusca : Cephalopoda

Material Reports, no. 33, p. 39.

Metarmenoceras kameii Niko   Holotype

Niko, S., 1990a   p. 596, fig. 3-3,4,5,7

Paleozoic | Mollusca : Cephalopoda

Material Reports, no. 33, p. 39.