Family: Trichome (filamentous structure) tapered from base to tail

Trichome without heterocysts
Homoeothrix Kuroiso Tochigi, 2001	Homoeothrix sp. Umi-no-nakamichi Fukuoka, 2001	Homoeothrix sp. Seseragi Park Musashi-Urawa Saitama, 2002	Homoeothrix sp. ? Central Park Tsukuba Ibaraki, 2002
Homoeothrix sp. or Calothrix ? Toneri Park Tokyo, 2001	Homoeothrix sp. near City Hall Fujimi Saitama, 2004	Homoeothrix sp. μm Kabuto-yama Hyogo, 2004	Homoeothrix sp. ? μm Tennoh Tessei-cho Okayama, 2004
Trichome with heterocysts
Calothrix Wakamiya Park Matto Ishikawa, 2002	C. braunii ? 180 x 12 μm Akagi forest p. Fujimi Gunma, 2005	C. braunii ? x 13 μm Murakuni ike Iwatsuki-bunka p. Saitama, 2006	Calothrix μm Ushidome-ike Norikura highland Nagano, 2005
Calothrix μm City Museum Iruma Saitama, 2006	Calothrix μm Aizu Recreation p. Aizuwakamatsu Fukushima, 2005	Calothrix μm Ukishima marsh Tsugaike highland Nagano, 2006	Calothrix μm Kamisuwa R.St. Suwa Nagano, 2007
Calothrix C. marchia ? Senuki Nasu Tochigi, 2004	Calothrix Tennoh Tessei-cho Okayama, 2005	Calothrix or Homoeothrix ? Saitama, 1999	Calothrix or Homoeothrix ? Tokachi river Obihiro Hokkaido, 2005
Calothrix or Homoeothrix ? Jionji-shinsui p. Iwatsuki-ku Saitama, 2006	Rivularia R. globiceps ? Mizuhata Nishi-ku Saitama, 2004	Isactis nipponica Chiba Port Park Chiba, 2003

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