Treptoceras yokoyamai (Kobayashi, 1927)
| 2002. | Treptoceras yokoyamai (Kobayashi, 1927) Niko, S. 2002a p. 121 |
| 1934. | Sactoceras yokoyamai (Kobayashi) Kobayashi, T. 1934b p. 439, pl. 27, figs. 3-5 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Paleozoic: |
| Kobayashi, T., 1934b: The Cambro-Ordovician formations and faunas of south Chosen. Palaeontology. Part 1. Middle Ordovician faunas. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 3, pt. 8, pp. 329–519, pls. 1–44. (Reference No. 0084) |
 |
| Niko, S., 2002a: Revision of an Ordovician cephalopod Ormoceras yokoyamai (Kobayashi, 1927). Paleontological Research, vol. 6, no. 1, pp. 121–124. (Reference No. 0740) |
 |
| Ito, Y. et al., 2008, no. 74, p. 34. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 84. |
