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Gamophyceae: Desmidales: Desmidiaceae
(Charophyceae: Zygnematales: Desmidiaceae)

 Micrasterias apiculata
(Ehrenberg) Meneghini ex Ralfs

Micrasterias apiculata 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:

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
scale 50 μm scale 100 μm scale 150 μm; x 400 :
Micrasterias Micrasterias
scale 31 μm scale 63 μm scale 94 μm; x 640
Micrasterias Micrasterias Micrasterias Micrasterias

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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