Chione laetifica (Yokoyama)
| 1959. | Chione laetifica (Yokoyama) Holotype Makiyama, J. 1959 pl. 66, fig. 10 |
| 1928. | Venus laetifica Yokoyama, 1928 Holotype Yokoyama, M. 1928b p. 360, pl. 68, fig. 10 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Veneridae: |
| Geologic Time: | Cenozoic: Pliocene: |
| Horizon: | Haizume formation: |
| Makiyama, J., 1959: Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part 3. Palaeontological Society of Japan, Special Papers, no. 5, pp. 1–4, pls. 58–86. (Reference No. 0369) |
| Yokoyama, M., 1928b: Neogene shells from the oil-field of Higashiyama, Echigo. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 2, pt. 7, pp. 351–362, pls. 68–69. (Reference No. 0495) |
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| Ichikawa, T., 1983, no. 9, p. 61. |
| Ichikawa, T., 1983, no. 9, p. 374. |
