| Shark-tooth (lower 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 1.6 cm, Width 1.1 cm (upper photo) Height 2.0 cm, Width 1.3 cm (lower photo) |
| File No. | CH013(upper photo) CH027(lower photo) |
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