Calyptogena nipponica longissima Yokoyama
| 1964. | Calyptogena nipponica longissima Yokoyama Holotype Shikama, T. 1964 p. 134, pl. 44, fig. 28 |
| 1958. | Calyptogena longissima (Yokoyama) Holotype Makiyama, J. 1958 pl. 27, fig. 1 |
| 1925. | Cucullaea longissima Yokoyama, 1925 Holotype Yokoyama, M. 1925c p. 20, pl. 3, fig. 1 |
| Condition: | Missing |
| Taxonomy: | Mollusca: Bivalvia: Vesicomyidae: |
| 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., 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) |
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| Ichikawa, T., 1988, no. 15, p. 174. |
| Ichikawa, T., 1983, no. 9, p. 48. |
| Ichikawa, T., 1983, no. 9, p. 314. |
