Species [ var. bioculatum ]: Cell body small in size (length = width), 15-(18-21) μm long, 15-(17-20)-21 μm wide, isthmus (5-5.5)-6.7 μm wide; semicells elongated ellipsoid, apex flattened, side view nearly circular, apical view elongated ellptical; cell wall smooth, transparent
[ var. depressum ]: Cell body nearly rectangular, each corner rounded, 14.5-(18)-20 μm long, 17-18-(22) μm wide, isthmus 7 μm wide; semicells elongated ellipsoid (Illustrations of The Japanese Fresh-water Algae, 1977).

Google Image Search

C. bioculatum var. depressum 24 x 26 μm Kejo-numa 1 Osaki Miyagi, 2006	C. bioculatum var. depressum 22 x 22 μm Umi-no-nakamichi Fukuoka, 2001	C. bioculatum var. depressum 20 x 22 μm Showa Memorial p. Tokyo, 2001	C. bioculatum var. depressum 20 x 22 μm Showa Memorial p. Tokyo, 2001
C. bioculatum var. depressum Kannon-numa f.p. Shimogo Fukushima, 2008	C. bioculatum var. depressum ? 19 x 23 μm Uruguay, 1999	C. bioculatum var. depressum ? or var. hians ? 13 x 12.5 μm Omine-numa 6 Minakami Gunma, 2007	C. bioculatum var. depressum ? or var. bioculatum ? 19 x 15.5 μm Ko-numa Minakami Gunma, 2007

Similar species -->> C. depressum; C. contractum;

Please click on species name for more images.

Copyright Protist Information Server