Order & Family: Floating unicells or a colony embedded in a matrix; no differentiation of apical and base structures; only one family.

Cells do not form a large coenobium; cell body covered by sheath
Chroococcus 61 samples 1.5-49 μm 1998-2008	Chroococcus 61 samples 1.5-49 μm 1998-2008	Cyanosarcina Syn. Myxosarcina 5 samples 2001-2003	Cyanosarcina Syn. Myxosarcina 5 samples 2001-2003
Synechocystis 8 samples μm Japan, 2004	Cyanothece Syn. Synechococcus 15 samples 16-69 μm 2005-2008	Dactylococcopsis	Tetrapedia
Cells form a large coenobium; outline shape irregular
Cell body spherical
Microcystis 33 samples 1998-2008	Microcystis 33 samples 1998-2008	Microcystis 33 samples 1998-2008
Aphanocapsa 20 samples 1.5- μm 1998-2006	Aphanocapsa 20 samples 1.5- μm 1998-2006	Gloeocapsa ? 2 samples μm Iruma Saitama, 2002
Eucapsis sp. μm Kenashitai Hakkoda mountain Aomori, 2005	Eucapsis sp. 9.5 x 7 μm Kenashitai 3 Hakkoda mountain Aomori, 2006
Cell body ellipsoidal or elongated
Aphanothece 18 samples 3-10 x μm 1998-2007	Gloeothece G. linearis or Rhabdoderma ? 8-14 x 1.7-2 μm Tanohara marsh Shiga highland Nagano, 2004	Rhabdoderma 10 samples 7-12 x 2-2.5 μm 2005-2008
Cells form a coenobium; outline shape constant
Merismopedia 41 samples M. glauca μm 1998-2008	Merismopedia 41 samples M. convoluta μm 1998-2008	Merismopedia 41 samples M. tenuissima μm 1998-2008	Merismopedia 41 samples M. minima μm 1998-2008
Pannus 5 samples 2-3.5 μm 1999-2004	Gomphosphaeria 1 sample μm 2006	Woronichinia 2 samples μm 1999-2000	Snowella 5 samples μm 2001-2004
Coelosphaerium 10 samples μm 1999-2006
Unidentified
Unidentified sp. μm Saitama, 2000	Unidentified sp. μm Japan, 2000	Unidentified sp. μm Saitama, 1999	Unidentified sp. μm Showa Memorial p. Tokyo, 2001
Unidentified sp. 5 x 3.5-4 μm Yokonuma Sakado Saitama, 2004	Unidentified sp. 4 x 3 μm Kinchakuda Hidaka Saitama, 2004

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