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: Colonies of 4-32 cells; cell body long crescent or spindle in shape, tapered at both ends; cells attached with each other at the center of the body, paralleled or radially arranged; no gelatinous sheath; a chloroplast; no pyrenoids; planktonic (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
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Similar Genus ->> Monoraphidium; Selenastrum;
Cell body relatively thick Cell body relatively thin
A. falcatus
24 samples
35-63 x 1-3 μm
1998-2006
A. falcatus
24 samples
35-63 x 1-3 μm
1998-2006
A. falcatus
24 samples
35-63 x 1.5-3 μm
1998-2006
A. falcatus
24 samples
35-63 x 1.5-3 μm
1998-2006.... Daughter cells stacked
Ankistrodesmus sp.
cell 30 x 2 μm
Nasu
Tochigi, 2001
Ankistrodesmus sp.
cell μm
Iruma River side
Tsurugashima
Saitama, 2003
A. densus
7 samples
39-56 x 2-3.5 μm
2001-2006
A. densus
7 samples
39-56 x 2-3.5 μm
2001-2006
A. spiralis
41 x 2 μm
Sayama Natural p.
Saitama, 2001???
Ankistrodesmus ?
or Monoraphidium ?
33-39 x 1.5-3 μm
body straight
Uruguay, 1999
Ankistrodesmus ?
or Monoraphidium ?
44 x 2 μm
body straight
Ueno
Tokyo, 2001
Ankistrodesmus ?
or Monoraphidium ?
stock Tus-12, axenic
34 x 3 μm
body straight
Ueno
Tokyo, 2001
Ankistrodesmus
μm
Sanda
Hyogo, 2001
Ankistrodesmus
or Selenastrum ?
μm
Sanda
Hyogo, 2001