Subgenus: lacks arm-like projections
(Illustrations of The Japanese Fresh-water Algae, 1977)
Species: Cell body 42-50 μm long, 42-50 μm wide,
St. kowetsii resembles St. brebissonii but differs by stouter and less closely inserted cell wall spines
(Coesel & Meesters, Desmids of the Lowlands, KNNV Publishing, 2007).
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