| Shark-tooth (upper tooth) Scientific name: Carcharodon carcharias (Linnaeus) |
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| Species | Vertebrata (Craniata) Chondrosyei |
| Place | Choshi, Chiba (Naarai Formation) |
| Epoch | Cenozoic Tertiary Pliocene |
| Size | Height 2.7 cm, Width 2.0 cm |
| File No. | CH012 |
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