Genus: Cell body short, radiate in shape; apical view of the cell, triangular, polygonal, ellipsoidal or spindle-shaped; zygospores formed outside of mother cells (Illustrations of The Japanese Fresh-water Algae, 1977)
Subgenus: with arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species:
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v. biexcavatum 33 x 36 μm Univ. A.V.M. Obihiro Hokkaido, 2005 |
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S. biexcavatum ? μm Kashiwa Village p. Kashiwa Chiba, 2008  |
S. biexcavatum ? 40 x 48 μm Hasuda Saitama, 2002 |
S. biexcavatum ? 38 x 43 μm Umi-no-nakamichi Fukuoka, 2001 |
S. biexcavatum or S. iotanum ? μm two arms ? Japan, 1997 |
S. biexcavatum ? 29 x 32-42 μm Mizumoto Park Tokyo, 2001 |
S. biexcavatum or S. iotanum ? 36 x 51 μm Saitama, 1999 |
S. biexcavatum ? μm Sa-numa park Shimotsuma Ibaraki, 2003 |
