Nemocardium yokoyamai Takeda, 1953
| 1960. | Nemocardium yokoyamai Takeda, 1953 Lectotype Oyama, K. et al. 1960 p. 175, pl. 66, fig. 6a |
| 1959. | Nemocardium yokoyamai Takeda Makiyama, J. 1959 pl. 77, fig. 5 |
| 1930. | Cardium (Laevicardium) tristiculum Yokoyama Yokoyama, M. 1930c p. 415, pl. 78, fig. 5 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Cardiidae: |
| Geologic Time: | Cenozoic: Oligocene: |
| Horizon: | Maoka group: |
| 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) |
| 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., 1930c: Tertiary Mollusca from south Karafto. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 2, pt. 10, pp. 407–418, pls. 77–80. (Reference No. 0500) |
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| Ichikawa, T., 1983, no. 9, p. 159. |
| Ichikawa, T., 1983, no. 9, p. 61. |
| Ichikawa, T., 1983, no. 9, p. 382. |
