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Chlorophyceae: Chlorococcales: Scenedesmaceae

Actinastrum
Lagerheim 1882

Family: Colonies of a fixed number of cells (4, 8, 16, 32, or more) arranged 2- or 3-dimensionally; cells spherical, ellipsoidal, polygonal, etc. in shape; chloroplasts 1 or several, plate-like in shape, with 1 pyrenoid; asexual reproduction by autocoenobium (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Colonies, 3-dimensional; cell body cylindrical or long spindle in shape, radially arranged by attaching at one end to each other (Illustrations of The Japanese Fresh-water Algae, 1977).
Google Image Search
Actinastrum
A. hantzschii
var. hantzschii
cell 19 x 3 μm
Japan, 1997
Actinastrum hantzschii
A. hantzschii
var. hantzschii
cell 14 x 2 μm
Mihashi Park
Saitama
Saitama, 2005
Actinastrum
A. hantzschii ?
var. hantzschii ?
cell 8 x 1.5 μm
Uruguay, 1999
Actinastrum
A. hantzschii
var. fluviatile
cell 40 x 7 μm
Japan, 1997
Actinastrum
A. hantzschii
var. fluviatile
16 x 2.3 μm
Japan, 2000
Actinastrum hantzschii
A. hantzschii
var. fluviatile
23 x 3 μm
Jizoh-bori
Sannoh Park
Saitama, 2005
Actinastrum
A. hantzschii
var. fluviatile
25 x 3 μm
Nakai-numa m.
Yoshikawa
Saitama, 2006
Actinastrum
A. hantzschii
var. fluviatile
cell 13 x 1.7 μm
Saitama, 1999
Actinastrum
A. hantzschii
var. fluviatile ?
cell 14 x 1.5 μm
Yamagata, 1999
Actinastrum
A. hantzschii
var. fluviatile ?
12-20 x 1.5-3 μm
Koriyama
Fukushima, 2001
Actinastrum hantzschii
A. hantzschii
var. fluviatile ?
or A. gracillimum ?
cell 16 x 2 μm
Shakujii Park
Tokyo, 2001
Actinastrum
A. hantzschii
var. fluviatile ?
or A. raphidioides ?
cell 16 x 2 μm
Ueno
Tokyo, 2001
Actinastrum
A. hantzschii
var. fluviatile ?
or A. raphidioides ?
cell 20 x 3 μm
Shobu
Saitama, 2004
Actinastrum hantzschii
A. hantzschii
var. fluviatile ?
or A. raphidioides ?
cell 20 x 2 μm
Sue-machi
Fukuoka, 2001
Actinastrum
A. hantzschii
var. fluviatile ?
or A. raphidioides ?
cell 25 x 3 μm
Mihashi Park
Saitama, 2002
Actinastrum
A. hantzschii
var. fluviatile ?
cell 20 x 2 μm
near Town Hall
Shobu
Saitama, 2004
Actinastrum
A. hantzschii
var. fluviatile ?
cell 25 x 2.5 μm
Shirahata-Numa
Urawa
Saitama, 2005
Actinastrum hantzschii
A. hantzschii
var. fluviatile ?
cell 25-28 x 2.5 μm
Shinrin-koen
Namegawa
Saitama, 2005

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Actinastrum
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