Phaxas izumoensis (Yokoyama)
| 1964. | Phaxas izumoensis (Yokoyama) Syntype Shikama, T. 1964 p. 142, pl. 48, fig. 18 |
| 1957. | Phaxus izumoensis jobanicus (Kanno) Makiyama, J. 1957 pl. 20, fig. 3 |
| 1952. | Phaxas izumoensis (Yokoyama) Syntype Shikama, T. 1952 p. 150, pl. 37, fig. 16 |
| 1943. | Cultellus izumoensis Yokoyama Shikama, T. 1943 p. 236, pl. 37, fig. 16 |
| 1925. | Cultellus izumoensis Yokoyama Yokoyama, M. 1925a p. 18, pl. 5, fig. 3 |
| Condition: | Missing |
| Taxonomy: | Mollusca: Bivalvia: Cultellidae: |
| Geologic Time: | Cenozoic: |
| Makiyama, J., 1957: Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part 1. Palaeontological Society of Japan, Special Papers, no. 3, pp. 1–4, pls. 1–24. (Reference No. 0367) |
| Shikama, T., 1943: A handbook of illustrated fossils from Japanese and their adjacent territories., pp. 1–279, pls. 1–46. Nippon Koubutu Syumi-no-kai, Kyoto. (in Japanese) (Reference No. 0616) |
| Shikama, T., 1952: A handbook of illustrated fossils from Japanese and their adjacent territories., pp. 1–376, pls. 1–57. Nippon Koubutu Syumi-no-kai, Kyoto. (in Japanese) (Reference No. 0617) |
| Shikama, T., 1964a: Index fossils of Japan., pp. 1–287, pls. 1–80. Asakura Shoten, Tokyo. (in Japanese) (Reference No. 0618) |
| Yokoyama, M., 1925a: Molluscan remains from the uppermost part of the Jo-ban coal-field. Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 5, pp. 1–34, pls. 1–6. (Reference No. 0473) |
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| Ichikawa, T., 1988, no. 15, p. 174. |
| Ichikawa, T., 1983, no. 9, p. 42. |
| Ichikawa, T., 1988, no. 15, p. 155. |
| Ichikawa, T., 1988, no. 15, p. 145. |
| Ichikawa, T., 1983, no. 9, p. 305. |
