Genus: Trichome without mucous sheath; straight, long, consisting of numerous cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Cell body 2-5 μm long, 5-9 μm wide, L/W=0.5; (Illustrations of The Japanese Fresh-water Algae, 1977).

O. iwanoffiana ? 7 μm φ L/W= near Town Hall Shobu Saitama, 2004	O. iwanoffiana ? 3-6 x 5 μm L/W=0.6-1.2 near Town Hall Shobu Saitama, 2003	O. iwanoffiana ? 5.5 μm φ L/W=0.5-1.1 Yanase river Fujimi Saitama, 2003	O. iwanoffiana ? 7 μm φ L/W=0.6-1.2 Hazama marsh Ashikaga Tochigi, 2003
O. iwanoffiana ? 3-6 x 5 μm L/W= near Yamaguchi Univ. Yamaguchi, 2004	O. iwanoffiana ? 4-8 x 7 μm L/W= Shimo-kawahara p. Sayama Saitama, 2005

Please click on species name for more images.

Copyright Protist Information Server