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Betulaceae gen. et sp. indet.

family Betulaceae Gray (1822)

• Modern species: Late Cretaceous - Present (99.7 - 0.0 Ma)

• Classification
• kingdom Plantae, Angiosperms, order Fagales

• Distribution
• Paleogene-Neogene: Nagano
• Paleocene: Hiroshima
• Eocene: Hokkaido
• Oligocene: Nagano
• Miocene: Hokkaido, Akita, Miyagi, Yamagata, Niigata, Nagano, Ibaraki, Saitama, Aichi, Gifu, Hyogo, Tottori, Kagawa, Ehime
• Miocene-Pliocene: Hokkaido, Tottori, Oita
• Pliocene: Hokkaido, Miyagi, Niigata, Aichi, Gifu, Mie, Hyogo
• Pliocene-Pleistocene: Niigata, Nagano, Saitama, Mie, Shimane, Kagawa
• Pleistocene: Hokkaido, Aomori, Iwate, Yamagata, Fukushima, Niigata, Nagano, Yamanashi, Toyama, Ishikawa, Gunma, Tochigi, Ibaraki, Tokyo, Chiba, Aichi, Mie, Kyoto, Hyogo, Osaka, Hiroshima, Yamaguchi
• Holocene: Toyama, Shizuoka, Aichi
• Investigation in progress: Yamagata, Nagano, Yamanashi, Fukui, Mie, Ehime, Oita

• Subtaxa
• Alnus, genus, Alder
• Betula, genus, Birch
• Carpinus, genus, Hornbeam
• Corylus, genus, Hazel
• Ostrya, genus, Hophornbeam