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Diatom(s)
class Bacillariophyceae
- Modern species
- Habitat: Marine, Brackish, Freshwater
- Classification
- kingdom Chromista, phylum Ochrophyta
- Distribution
- Oligocene-Miocene: Hokkaido
- Miocene: Hokkaido, Aomori, Iwate, Miyagi, Fukushima, Niigata, Nagano, Toyama, Ishikawa, Tochigi, Ibaraki, Saitama, Okayama
- Miocene-Pliocene: Hokkaido, Fukushima, Niigata, Nagano, Tottori, Oita
- Pliocene: Hokkaido, Aomori, Miyagi, Niigata, Ibaraki, Gifu, Shiga, Hyogo, Okayama, Fukuoka
- Pliocene-Pleistocene: Hokkaido, Nagano, Saitama, Mie, Shimane
- Quaternary: Chiba
- Pleistocene: Hokkaido, Miyagi, Yamagata, Niigata, Nagano, Toyama, Ishikawa, Gunma, Tochigi, Tokyo, Mie, Shiga, Hyogo, Okayama
- Holocene: Saitama, Chiba, Kyoto
- Investigation in progress: Niigata, Nagano, Yamanashi, Kanagawa
- Subtaxa
- Achnanthes inflata
- Achnanthes oestrupii
- Achnanthidium lanceolatum f. lanceolatum
- Actinocyclus, genus
- Actinoptychus splendens
- Amphora, genus
- Arachnoidiscus ehrenbergii
- Aulacodiscus kittonii
- Aulacoseira, genus
- Biddulphia tridentata f. tridentata
- Chaetoceros, genus
- Cocconeis, genus
- Cocconema parvum
- Coscinodiscus, genus
- Cyclotella, genus
- Cymbella, genus
- Denticula, genus
- Denticulopsis, genus
- Diatoma vulgaris var. linearis
- Diploneis, genus
- Epithemia, genus
- Eunotia, genus
- Eupodiscus sculptus
- Fragilaria, genus
- Frustulia amphipleuroides
- Frustulia lanceolata
- Gaillonella sulcata
- Gomphonema, genus
- Halamphora veneta
- Hemidiscus cuneiformis
- Melosira, genus
- Navicula, genus
- Nitzschia amphibia
- Pinnularia, genus
- Placoneis placentula var. rostrata
- Plagiogramma, genus
- Rhabdonema, genus
- Rhaphoneis amphiceros
- Rhizosolenia semispina
- Rhoicosphenia abbreviata
- Rhopalodia gibberula
- Rhopalodia rupestris
- Shionodiscus oestrupii
- Stauroneis, genus
- Staurosirella lapponica
- Stephanodiscus, genus
- Stephanopyxis, genus
- Stictodiscus hardmanianus
- Surirella, genus
- Synedra capitata f.capitata
- Synedra jouseana
- Synedra ulna
- Terpsinoë, genus
- Tetracyclus emarginatus
- Thalassionema, genus
- Thalassiosira, genus
- Triceratium, genus
- Tryblionella punctata