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Ulvophyceae: Ulotrichales: Ulotrichaceae
Phylum Viridiplantae: Subphylum Streptohyta: Class Klebsormidiophyceae (Protistology, 2003)

Klebsormidium flaccidum
(Kützing) S. Mattox et Blackwell
Syn.: Hormidium flaccidum (Kützing) Braun

Klebsormidium Family: Chloroplasts plate-like or ribbon-like; sexual reproduction by isogamy.
Genus: Without gelatinous sheath; filaments consist of many cells; no rhizoid (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: cell body cylindrical or somewhat laterally swelled, 6-12 μm long, 8-12 μm wide; a single chloroplast plate-like, parietal covering half of the cell wall, with a pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar Genus ->> Ulothrix

Klebsormidium flaccidum (Kützing) S. Mattox et Blackwell (or Ulthorix ?), cell body 11-18 μm long, 12.5 μm wide, x 640, a small wetland near Numa-no-hara marsh (Genseikaen), Madarao highland (Niigata & Nagano Pref.), Myoko village, Niigata Pref., Japan, May 15, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Klebsormidium Klebsormidium Klebsormidium Klebsormidium Klebsormidium

Klebsormidium flaccidum (Kützing) S. Mattox et Blackwell (Syn. Hormidium flaccidum (Kützing) Braun): Cell body cylindrical; may slightly swells at middle of the cell; 8-12 μm long, 6-12 μm diam., a single chloroplast plate-like, extends 1/2 of the cell wall (Illustrations of The Japanese Fresh-water Algae, 1977).

Klebsormidium klebsii (G. M. Smith) S. Mattox et Blackwell: Similar to K. flaccidum, but cell body longer; 18-25 μm long, 6-8 μm diam., a single chloroplast with a pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).

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