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Chlorophyceae: Chlorococcales: Scenedesmaceae

Crucigenia quadrata
Morren var. quadrata

Crucigenia Genus: Arrangement of 4 daughter cells flat and rectangular in shape, forming composite coenobium; without gelatinous sheaths, no hairly projections (Illustrations of the Japanese Freshwater Algae, 1977).
Species: Colonies circular in outline, with a small rectangular space at the center; cell body nearly spherical or triangular, 3-7 μm long, 3-6 μm wide; chloroplasts 1-4, parietal disciform, with a pyrenoid (Photomicrographs of the Freshwater Algae, vol. 3, 1985).

Crucigenia quadrata Morren var. quadrata ??, similar to Merismopedia (Cyanobacteria), cell body 6 μm long, 3.5-5 μm wide, x 640, Maruyama Park, Ageo city, Saitama Pref., Japan, March 2002 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
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