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: Cell body curved reniform, 5-8 μm long, 3-5 μm wide (Illustrations of the Japanese Freshwater Algae, 1977).

50 μm 100 μm 150 μm; x 400

Crucigenia crucifera (Wolle) Collins, x 400, x 640, Green-Park, Nishi-Urawa, Saitama Pref., Japan, June 2001 by Y. Tsukii
50 μm 100 μm 150 μm; x 400