| 1964. | Anadara (Scapharca) valentula (Yokoyama) Syntype Shikama, T. 1964 p. 118, pl. 36, fig. 22 |
| 1957. | Anadara valentula (Yokoyama) Syntype Makiyama, J. 1957 pl. 8, fig. 2, 2a |
| 1923. | Arca valentula Yokoyama, 1923 Syntype Yokoyama, M. 1923d p. 57, pl. 7, fig. 2, 2a |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Arcidae: |
| 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., 1964a: Index fossils of Japan., pp. 1–287, pls. 1–80. Asakura Shoten, Tokyo. (in Japanese) (Reference No. 0618) |
| Yokoyama, M., 1923d: Tertiary fossils from Kii. Japanese Journal of Geology and Geography, vol. 2, no. 3, pp. 47–58, pls. 6–7. (Reference No. 0470) |
| Ichikawa, T., 1988, no. 15, p. 175. |
| Ichikawa, T., 1983, no. 9, p. 46. |
| Ichikawa, T., 1983, no. 9, p. 295. |
