Gamophyceae:
Desmidales: Desmidiaceae
(Charophyceae: Zygnematales: Desmidiaceae)
Micrasterias crux-melitensis
(Ehrenberg) Hassall ex Ralfs var. crux-melitensis
Genus:
Cell body flat, large, variable in shape, longer than wide; strong constriction at center;
each semicell with several notches; cell wall with many short spines
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
102-129 μm long, 84-124 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
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Micrasterias crux-melitensis Hassall var. crux-melitensis,
cell body 118 μm long, 90 μm wide (L/W=1.3), isthmus 20 μm wide,
x 640, rice field near Oyomi marsh, Hakuba village, Nagano Pref., Japan, October 3, 2004 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Cell body 100 μm long, 87 μm wide (L/W=1.1), isthmus 17 μm wide, x 640
* Micrasterias crux-melitensis (Ehrenberg) Hassall ex Ralfs 1848 var. crux-melitensis:
102-129 μm long,
84-124 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
Micrasterias crux-melitensis (Ehrenberg) Hassall ex Ralfs 1848 var. superflua Turner:
116 μm long,
116 μm wide;
constriction 17 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
Micrasterias radiata Hassall:
123-(140)-195 μm long,
113-(140)-186 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
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