Portlandia ( Megayoldia ) tsuruensis Sugita, 1962
| 1962. | Portlandia (Megayoldia) tsuruensis Sugita, 1962 Paratype Sugita, M. 1962 p. 286, pl. 44, fig. 2 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Yoldiidae: |
| Geologic Time: | Cenozoic: Miocene: |
| Horizon: | Lower Shimada formation: |
| Sugita, M., 1962: The fossils and their habitats in the Neogene Katsuragawa group, in the south Kwanto region. Transactions and Proceedings of the Palaeontological Society of Japan. New Series, no. 47, pp. 281–290, pl. 44. (Reference No. 0414) |
| Ichikawa, T., 1983, no. 9, p. 162. |
