Cyclocardia siogamensis (Nomura)
| 1957. | Cyclocardia siogamensis (Nomura) Makiyama, J. 1957 pl. 22, fig. 6 |
| 1925. | Venericardia ferruginea Adams Yokoyama, M. 1925b p. 8, pl. 1, fig. 6 |
| Condition: | Missing |
| Taxonomy: | Mollusca: Bivalvia: Carditidae: |
| 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) |
| Yokoyama, M., 1925b: Molluscan remains from the middle part of the Jo-ban coal-field. Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 7, pp. 1–23, pls. 1–3. (Reference No. 0474) |
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| Ichikawa, T., 1983, no. 9, p. 43. |
| Ichikawa, T., 1983, no. 9, p. 309. |
