Trapezium nipponicum Yokoyama
| 1926. | Trapezium nipponicum Yokoyama |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Trapeziidae: |
| Geologic Time: | Cenozoic: |
| Yokoyama, M., 1926f: Fossil shells from Sado. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 8, pp. 249–312, pls. 32–37. (Reference No. 0483) |
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| Ichikawa, T., 1983, no. 9, p. 331. |
