| 1964. | Anadara (Diluvarca) amicula (Yokoyama) Syntype Shikama, T. 1964 p. 118, pl. 36, fig. 24 |
| 1958. | Anadara amicula (Yokoyama) Syntype Makiyama, J. 1958 pl. 31, fig. 4 |
| 1952. | Anadara (Diluvarca) amicula (Yokoyama) Syntype Shikama, T. 1952 p. 154, pl. 39, fig. 9 |
| 1943. | Arca (Scapharca) amicula Yokoyama Syntype Shikama, T. 1943 p. 242, pl. 39, fig. 9 |
| 1925. | Arca amicula Yokoyama, 1925 Syntype Yokoyama, M. 1925c p. 19, pl. 7, fig. 4 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Arcidae: |
| Geologic Time: | Cenozoic: |
| Makiyama, J., 1958: Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part 2. Palaeontological Society of Japan, Special Papers, no. 4, pp. 1–6, pls. 25–57. (Reference No. 0368) |
| Shikama, T., 1943: A handbook of illustrated fossils from Japanese and their adjacent territories., pp. 1–282, 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., 1925c: Tertiary Mollusca from Shinano and Echigo. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 1, pp. 1–23, pls. 1–7. (Reference No. 0475) |
 |
| Ichikawa, T., 1988, no. 15, p. 174. |
| Ichikawa, T., 1983, no. 9, p. 48. |
| Ichikawa, T., 1988, no. 15, p. 156. |
| Ichikawa, T., 1988, no. 15, p. 146. |
| Ichikawa, T., 1983, no. 9, p. 314. |
