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).

Cell body slightly curved
C. crucifera 9.5 x 4.7 μm Ueno Tokyo, 2001	C. crucifera 6 x 4 μm Bessho numa Saitama, 2001	C. crucifera 7 x 4.5 μm Mizumoto park Tokyo, 2001	C. crucifera 7 x 4.5 μm Abiko Chiba, 2000
C. crucifera 7 x 3 μm Nasu Tochigi, 2001	C. crucifera 7 x 4 μm Shakujii Park Tokyo, 2001	C. crucifera μm Kodama Saitama, 2003	C. crucifera μm Chiba-Minato Park Chiba, 2003
C. crucifera μm O-ike park Yabuki Fukushima, 2003	C. crucifera μm Higusa-numa Hikari Chiba, 2003	C. crucifera 8 x 4-4.5 μm Noda Namegawa Saitama, 2004	C. crucifera 8 x 5 μm water reservoir near Yamaguchi Univ. Yamaguchi, 2004
C. crucifera μm KitaKashiwa FP Kashiwa Chiba, 2008	C. crucifera 7 x 3.5 μm Tane-ike Togakushi highland Nagano, 2005	C. crucifera μm Kataki-numa Yuri-Honjo Akita, 2008

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