Grammatodon ( Nanonavis ) yokoyamai Yabe & Nagao
| 1980. | Grammatodon (Nanonavis) yokoyamai Yabe & Nagao Hayami, I. & Oji, T. 1980 p. 427 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Parallelodontidae: |
| Geologic Time: | Mesozoic: |
| Hayami, I. and Oji, T., 1980: Early Cretaceous Bivalvia from the Choshi district, Chiba Prefecture, Japan. Transactions and Proceedings of the Palaeontological Society of Japan. New Series, no. 120, pp. 419–448, pls. 51–53. (Reference No. 0523) |
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| Ichikawa, T., 1988, no. 15, p. 22. |
