Genus:

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Cell body boat-shaped
Navicula sp.1 94 x 18 μm Lake Shoji Yamanashi, 199?	N. radiosa 2 samples 85-91 μm Japan, 2005	N. phyllepta ? 3 samples 70-92 μm 1998-2005	Navicula sp. 60 x 12 μm Shiken-zaike Kamikawa Saitama, 2004
Navicula sp.3 37 μm Nishi-Urawa Saitama, 2003	N. cryptocephala 44 μm Zenko-ji Nagano, 2003	Navicula sp. 64 x 18 μm Kuroiso Tochigi, 2001	Navicula sp. ? 62 x 17 μm Japan, 1999
Navicula sp.3 ? 46, 52, 58 μm Japan, 1998	Navicula sp. 38 μm Senjo-ga-hara Nikko Tochigi, 2003	Navicula sp. 52 x 18 μm Japan, 199?	N. bottnica ? 49 x 16 μm Kawaguchi Natural p. Kawaguchi city Saitama, 2005
Navicula sp.3 29 x 9 μm Uruguay, 1999	Navicula sp. ? 50 x 7 μm Japan, 1997	Navicula sp. ? 50 x 7 μm Japan, 1998	Navicula sp. 45 x 12 μm Japan, 1998
Navicula sp. ? 20 x 8 μm Kawagoe Saitama, 2001	Navicula sp. ? or Frustulia ? μm O-ike park Yabuki Fukushima, 2003	Navicula sp. ? μm Chiba-Minato p. Chiba, 2003
Navicula sp. 39 x 11 μm Ogasaki Saitama Saitama, 2005	Navicula sp. 36 x 11 μm near Oppe river Kawajima Saitama, 2005	Navicula sp. 35 x 10 μm Kiyose river Kiyose Tokyo, 2004	Navicula sp. 29 x 9 μm Kitayama park Higashi-Murayama Tokyo, 2004
Both ends slightly constricted
N. viridula ? 73 x μm Yamato Kanagawa, 2003	Navicula sp.1 ? 51 x 11 μm Japan, 1999	Navicula sp.1 ? μm Matsubushi Saitama, 2003	Navicula sp. μm Moroyama Saitama, 2003
Navicula sp. μm Sakado Saitama, 2003	Navicula sp. μm Yamato Kanagawa, 2003
Navicula sp.4 52 x 8.5 μm Uruguay, 1999	Navicula sp. μm Ranzan Saitama, 2003	Navicula sp. 30 x 4.5 μm Hirose athletic p. Kumagaya Saitama, 2004
Both ends strongly constricted
N. salinarum ? 2 samples 59-75 μm 2001-2004	N. constans ? μm Daidarabotchi-ike Iizuna-kogen Nagano, 2003	N. clementis ? 40 x 19 μm Omoi river Oyama Tochigi, 2004
N. pupula ? 51 x 11 μm 47 x 12 μm Akigase park Saitama city Saitama, 2005	N. pupula ? μm river bank Doman-green Park Saitama, 2003	N. pupula ? 40 x 10 μm History and folk m. Tajima Fukushima, 2004	N. pupula ? 25 x 8.5 μm drainage ditch Saitama city Saitama, 2005
N. absoluta ? 31 x 11 μm Akigase park Saitama February, 2005	N. absoluta ? 36 x 12 μm Akigase park Saitama September, 2005	Navicula sp. ? 47 x 13 μm Imou bog Toyohashi Aichi, 2004	Navicula sp. ? 40 x 10 μm near Town Hall Shobu Saitama, 2005
Navicula sp. ? or C. cuspidata ? 71 x 23 μm Uruguay, 1999	N. cuspidata ? 10 samples 48-82 μm 2001-2006	N. decussis ? 2 samples 32 μm 2003-2004	N. accomoda ? 51 x 14 μm Shin-Akitsu Higashi-Murayama Tokyo, 2004
???
Navicula sp. ? or Frustulia ? 110 x 30 μm nature obs. p. Kitamoto Saitama, 2005	Navicula sp. or Frustulia ? 43 x 12 μm Shin-Akitsu Higashi-Murayama Tokyo, 2004	Navicula sp. or Frustulia ? 40 x 8.5 μm Kitayama park Higashi-Murayama Tokyo, 2004
Navicula sp. 57 x 16 μm Shin-Akitsu Higashi-Murayama Tokyo, 2004	N. harderii 36 x 9.5 μm Shimo-muneoka Shiki Saitama, 2004	Navicula sp. ?? 205 x 47 μm near City Hall Fujimi Saitama, 2004

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