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Alnus sp., Alder(s)

genus Alnus Miller (1754)

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

• Classification
• kingdom Plantae, Angiosperms, order Fagales, family Betulaceae

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

• Subtaxa
• A. firma
• A. hirsuta, Manchurian alder
• A. inokumae
• A. japonica, East asian alder
• A. maximowiczii, Montane alder
• A. miojaponica
• A. pendula
• A. protohirsuta
• A. protomaximowiczii
• A. serrulatoides
• A. subfirma
• A. tsudae
• A. usyuensis