Umbonium giganteum (Lesson)
| 1927. | Umbonium giganteum (Lesson) |
| Condition: | Present |
| Taxonomy: | Mollusca: Gastropoda: Trochidae: |
| 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) |
 |
| Ichikawa, T., 1983, no. 9, p. 352. |
