Argonauta tokunagai Yokoyama
| 1964. | Argonauta tokunagai Yokoyama Syntype Shikama, T. 1964 p. 160, pl. 57, fig. 13 |
| 1954. | Argonauta tokunagai Yokoyama Kobayashi, T. 1954d p. 29, pl. 4, figs. 1, 2 |
| 1913. | Argonauta tokunagai Yokoyama, 1913 Syntype Yokoyama, M. 1913 p. 1, pl. 7, figs. 1-3 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: Argonautidae: |
| Geologic Time: | Cenozoic: |
| Kobayashi, T., 1954d: Izumonauta, a new genus of the Argonautinae, with a note on their rare but gregarious fossil occurence. Japanese Journal of Geology and Geography, vol. 25, nos. 1–2, pp. 21–34, pls. 3–4. (Reference No. 0359) |
| Shikama, T., 1964a: Index fossils of Japan., pp. 1–287, pls. 1–80. Asakura Shoten, Tokyo. (in Japanese) (Reference No. 0618) |
| Yokoyama, M., 1913: On two new fossil Cephalopoda from the Tertiary of Izumo. Journal of the Geological Society of Tokyo, vol. 20, no. 243, pp. 1–3, pls. 7–8. (Reference No. 0463) |
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| Ichikawa, T., 1988, no. 15, p. 163. |
| Ichikawa, T., 1983, no. 9, p. 35. |
| Ichikawa, T., 1983, no. 9, p. 251. |
