Calyptrea sp.
| 1936. | Calyptrea sp. |
| Condition: | Missing |
| Taxonomy: | Mollusca: Gastropoda: Calyptraeidae: |
| Geologic Time: | Cenozoic: |
| Otuka, Y., 1936c: The Takasegawa green tuff beds of the Yuri district, Akita Pref., Japan, and correlation of the lower Neogene in Japan. Bulletin of the Earthquake Research Institute, Tokyo Imperial University, vol. 14, pt. 3, pp. 438–452, pl. 30. (Reference No. 0390) |
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| Ichikawa, T., 1983, no. 9, p. 101. |
