| Specimen state | |
|---|---|
| Common name | Bivalue,Plicatounio |
| Scientific name | Plicatounio(Plicatounio) naktongensis Kobayashi and Suzuki |
| Order | |
| Family | |
| Country | Japan |
| Prefecture, State | Kumamoto |
| City | Kamimasiki,Kosa |
| Group | Mifune G. |
| Formation | Basal L. |
| Era | Mesozoic |
| Period | Cretaceous |
| Epoch | Late |