Section [ Actinotaenium ]:
Cell body cylindrical, slightly constricted at the center, cell surface smooth or dotted or punctated
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
Cell body medium in size, 65-(67-79) μm long, 38-40-(41-45) μm wide,
isthmus 37-(39-41) μm wide, L/W=1.5; semicells semielliptical, with slightly
flattened apex, apical view circular; cell wall dotted
(Illustrations of The Japanese Fresh-water Algae, 1977).
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