Polyptychoceras subundatum (Yokoyama)
| 1963. | Polyptychoceras subundatum (Yokoyama) Lectotype Matsumoto, T. et al. 1963 p. 30, pl. 46, fig. 6 |
| 1890. | Anisoceras subundatum Yokoyama Syntype Yokoyama, M. 1890 p. 183, pl. 20, fig. 6 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Mesozoic: |
| Matsumoto, T., Hayami, I. and Asano, K., 1963: A survey of the fossils from Japan illustrated in classical monographs. Part 7. Matajiro Yokoyama (1890): Versteinerungen aus der japanischen Kreide. Palaeontological Society of Japan, 25th Anniversary Volume, pp. 27–32, pls. 44–51. (Reference No. 0663) |
| Yokoyama, M., 1890: Versteinerungen aus der japanischen Kreide. Palaeontographica, Bd. 36, pp. 159–202, pls. 18–25. (Reference No. 0714) |
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| Ichikawa, T., 1995, no. 33, p. 34. |
| Ichikawa, T., 1995, no. 33, p. 64. |
