Order & Family: Floating unicells or a colony embedded in a matrix; no differentiation of apical and base structures; only one family.
Genus: A colony of spherical cells; each cell is not covered with a sheath, instead cells are scattered within a gelatinous matrix; the distance between cells is usually longer than their diameter (Illustrations of The Japanese Fresh-water Algae, 1977).

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Aphanocapsa Japan, 1998	Aphanocapsa μm Japan, 1998	Aphanocapsa ? or Microcystis ? Iruma Saitama, 2002	Aphanocapsa or Microcystis ? μm Senjo-ga-hara Nikko Tochigi, 2001
Aphanocapsa ? μm Kayoicho-ike Fukuoka, 2001	Aphanocapsa ? or Aphanothece ? μm Iruma Saitama, 2002	Aphanocapsa ? or Aphanothece ? μm Showa Memorial p. Tokyo, 2001	Aphanocapsa ? or Aphanothece ? μm Koga museum Koga Ibaraki, 2003
Aphanocapsa ? μm Kasuga Fukuoka, 2001	Aphanocapsa ? μm Wakamiya Park Matto Ishikawa, 2002	Aphanocapsa ? or Aphanothece ? μm Wakamiya Park Matto Ishikawa, 2002	Aphanocapsa ? or Aphanothece ? 4-7 x 3-5 μm Kamisuwa r.w.st. Suwa Nagano, 2005
A. kordersi ? 2.5-3.0 μm Chiba Port Park Chiba, 2003	Aphanocapsa sp. 2-3 μm water reservoir near Yamaguchi Univ. Yamaguchi, 2004	Aphanocapsa sp. 2 μm Yakebe-ike Sayama park Tokyo, 2006	Aphanocapsa sp. μm Karakemi marsh Omachi Nagano, 2006
A. elachista ? 1.0-1.5 μm Lake Biwa Maihara Shiga, 2003	Aphanocapsa sp. 1.5 μm Tane-ike Togakushi highland Nagano, 2005	Aphanocapsa sp. 1.5 μm Hasu-ike Shiga highland Nagano, 2005	Aphanocapsa sp. 1.5 μm Kannon-numa f.p. Shimogo Fukushima, 2005

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