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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium connatum
Brébisson ex Ralfs

Cosmarium Species: Cell body slightly large, (62-87)-100 μm long, (45-70)-74 μm wide, isthmus 37-53 μm wide, L/W=1.3; semicells elliptial, apex broadly rounded, slightly flattened, apical view circular or broad ellipitical; cell wall covered with small pores interspersed with many dots, (Illustrations of The Japanese Fresh-water Algae, 1977).

Cosmarium connatum (= Actinotaenium connatum) Brébisson ex Ralfs, cell body 71 μm long, 51 μm wide, L/W=1.4, isthmus 44 μm wide, x 640, Yoshigadaira (or Yoshigataira) marsh, Shirane mountain, Kusatsu town, Gunma Pref., Japan, June 5, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium connatum Cosmarium connatum Cosmarium connatum

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