Basterotia trapezium Yokoyama
| 1927. | Basterotia trapezium Yokoyama |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Sportellidae: |
| Geologic Time: | Cenozoic: |
| Yokoyama, M., 1927a: Mollusca from the upper Musashino of Tokyo and its Suburbs. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 10, pp. 391–437, pls. 46–50. (Reference No. 0488) |
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| Ichikawa, T., 1983, no. 9, p. 353. |
