Gamophyceae:
Desmidales: Desmidiaceae
(Charophyceae: Zygnematales: Desmidiaceae)
Micrasterias apiculata
(Ehrenberg) Meneghini ex Ralfs
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:
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Micrasterias apiculata (Ehrenberg) Meneghini ex Ralfs ,
cell body 232 μm long, 180 μm wide (L/W=1.3), isthmus 40 μm wide,
x 400, x 640, Ikenokochi (or Ikenokouchi) marsh, Tsuruga city, Fukui Pref., Japan, September 11, 2004 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Micrasterias apiculata (Ehrenberg) Meneghini ex Ralfs :
Cell body large, ellipsoidal, slightly longer than wide; strong constriction at center;
semicell consists of 5 parts; deepest indentations between apical and adjacent parts at
right- and left-hand; apical part with tree spiny projections at each corner;
lateral parts dichotomously branched two times (i.e., with three notches, central one larger than others);
each branch with small notches; cell wall covered with many short spines;
(187-216)-294 μm long,
(160-176)-250 μm wide,
constriction 30-(34-42) μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
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