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Toothed whale(s), Dolphin(s)
superfamily Odontoceti Flower, 1867
- Distribution
- Miocene: Hokkaido, Iwate, Nagano, Ishikawa, Gunma, Tochigi, Aichi, Gifu, Mie
- Pliocene: Hokkaido, Miyagi
- Pliocene-Pleistocene: Kanagawa
- Pleistocene: Yamagata, Tokyo, Chiba
- Holocene: Saitama, Chiba, Aichi, Osaka