Yokoyamaoceras ishikawai (Jimbo)
| 1993. | Yokoyamaoceras ishikawai (Jimbo) Maeda, H. 1993 p. 110, fig. 4-9,10 |
| 1991. | Yokoyamaoceras kotoi (Jimbo) Holotype Matsumoto, T. 1991 p. 100, pl. 23, fig. 2 |
| 1955. | Yokoyamaoceras jimboi Matsumoto Holotype Matsumoto, T. 1955a p. 153, pl. 9, fig. 4a, b PreviousNo: I-349a |
| Condition: | Present |
| Material: | Microconch |
| Taxonomy: | Mollusca: Cephalopoda: Ammonitida: Ammonitina: Desmoceratoidea: Kossmaticeratidae: |
| Geologic Time: | Mesozoic: Cretaceous: Late Cretaceous: Santonian: |
| Horizon: | Upper Yezo Group: |
| Locality: | Japan: Hokkaido: Hobetsu: The Saushi-sanushibe Valley: |
| 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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| Matsumoto, T., 1955a: Family Kossmaticeratidae from Hokkaido and Saghalien. Studies on the Cretaceous ammonites from Hokkaido and Saghalien 6. Japanese Journal of Geology and Geography, vol. 26, nos. 1–2, pp. 115–164, pls. 8–10. (Reference No. 0221) |
| Matsumoto, T., 1991: The mid-Cretaceous ammonites of the family Kossmaticeratidae from Japan. Palaeontological Society of Japan, Special Papers, no. 33, pp. i–vi + 1–143, pls. 1–31. (Reference No. 0662) |
| Tanabe, K., Ito, Y., Moriya, K. and Sasaki, T., 2000: Database of Cretaceous ammonite specimens registered in the Department of Historical Geology and Paleontology of the University Museum, University of Tokyo. The University Museum, The University of Tokyo, Material Reports, no. 37, pp. i–iv + 1–509. (Reference No. 0879) |
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| Ichikawa, T., 1995, no. 33, p. 30. |
| Ichikawa, T., 1995, no. 33, p. 33. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 216. |
| Tanabe et al., 2000, no. 37, p. 500. |
| Tanabe et al., 2000, no. 37, p. 500. |
