Family: Unicells or colonies of non-fixed number of cells; cell body variable in shape; one or more chloroplasts variable in shape; asexual reproduction by autospore or autocoenobium (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Cell body elongated spindle in shape, straight or curved, sharply pointed at both ends; (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
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Cell body thin, long: L/W > 20 Cell body thick, short: L/W < 20 13 samples 22 samples
M. griffithii
72-88 x 3-4 μm
L/W=20-31
1997-2004
M. griffithii
72-88 x 3-4 μm
L/W=20-31
1997-2004
M. litorale
22-48 x 3-5 μm
L/W=7-11
1999-2001
M. litorale
22-48 x 3-5 μm
L/W=7-11
1999-2001Daughter cells attached each other Cell body very small 13 samples 4 samples
Monoraphidium sp.1
41-62 μm
L/W=10-21
2001-2004
Monoraphidium sp.1
41-62 μm
L/W=10-21
2001-2004
M. lunare
7.5-19 x 2-5 μm
L/W=2-9.5
2001-2004
M. lunare
7.5-19 x 2-5 μm
L/W=2-9.5
2001-2004Both ends tapered Cell body twisted 2 samples 10 samples
M. komarkovae ??
cell body large
no pyrenoids
125 x 7 μm
L/W=18
Ueno
Tokyo, 2001
Monoraphidium sp.2 ?
cell body small
two pyrenoids
66 x 3 μm
L/W=22
Ueno
Tokyo, 2001
M. contortum ?
25-80 x 1.5-5 μm
1997-2005
M. contortum ?
25-80 x 1.5-5 μm
1997-2005
Monoraphidium ?
30 x 3 μm
L/W=10
History & folk m.
Tajima
Fukushima, 2004