Subgenus: Entomum (Apical area deeply indented or notched)
Section: Excisa (Cell surface granulated or dented; apical area with spiny projections)
Species: Cell body 37-38 μm long, 26 μm wide, L/W=1.5, constriction 8 μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).
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E. geometricum 40 x 28 μm Ishinazaka Furukawa Miyagi, 2003 |
E. geometricum or E. denticulatum ? 38 x 27 μm Imou bog Toyohashi Aichi, 2004 |
E. geometricum 51 x 30 μm USA, 1999 |
