Yokoyamaoceras ishikawai (Jimbo)
| 1993. | Yokoyamaoceras ishikawai (Jimbo) Maeda, H. 1993 p. 124 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Mesozoic: |
| Maeda, H., 1993: Dimorphism of Late Cretaceous false-Puzosiine ammonites, Yokoyamaoceras Wright and Matsumoto, 1954 and Neopuzosia Matsumoto, 1954. Transactions and Proceedings of the Palaeontological Society of Japan. New Series, no. 169, pp. 97–128. (Reference No. 0659) |
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| Ichikawa, T., 1995, no. 33, p. 31. |
