| Specimen state | |
|---|---|
| Common name | Brachidontes mashikensis Tamura Internal mold of left valve |
| Scientific name | |
| Order | |
| Family | |
| Country | Japan |
| Prefecture, State | Kumamoto |
| City | Kamimasiki,Mifune |
| Group | Mifune Group |
| Formation | Upper F. Mifune G. |
| Era | Mesozoic |
| Period | Cretaceous |
| Epoch | Late |