Vasticardium otukai Hatai & Nisiyama, 1952
| 1960. | Vasticardium otukai Hatai & Nisiyama, 1952 Holotype Oyama, K. et al. 1960 p. 179, pl. 55, fig. 2 |
| 1958. | Cardium burchardi Dunker Makiyama, J. 1958 pl. 32, fig. 9 |
| 1925. | Cardium burchardi Dunker Yokoyama, M. 1925d p. 120, pl. 14, fig. 9 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Cardiidae: |
| Geologic Time: | Cenozoic: Oligocene: |
| Horizon: | Hikokubo group: |
| 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) |
| Oyama, K., Mizuno, A. and Sakamoto, T., 1960: Illustrated handbook of Japanese Paleogene molluscs., pp. 1–244, pls. 1–71. Geological Survey of Japan. (Reference No. 0412) |
| Yokoyama, M., 1925d: Mollusca from the Tertiary basin of Chichibu. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 3, pp. 111–126, pls. 14–15. (Reference No. 0476) |
 |
| Ichikawa, T., 1983, no. 9, p. 158. |
| Ichikawa, T., 1983, no. 9, p. 48. |
| Ichikawa, T., 1983, no. 9, p. 316. |
