English: Fossil specimen GMNH-PV-999 of a spinosaurid tooth resembling that of Siamosaurus, at the National Museum of Nature and Science in Tokyo. Identity of specimen confirmed by comparisons with[1]
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Cropped to show only this particular specimen, adjusted white balance, and increased clarity of details.
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