Genus: Highly flattened; pellicle firm; body form constant (Kudo, 1966). Chloroplasts small, discoid, pyrenoids usually absent; most species flat and leaf-shaped; often with ridges or fins running helically or longitudinally (Illustrated Guide, 1985). Species: Cell body 100-115 μm long,m, 70-80 μm wide (Ciugulea I. & Triemer R.E., A Color Atlas of Phtosyntetic Euglenoids, Michigan State University Press, 2010).

31 μm 63 μm 94 μm; x 640

Images of collecting locality: Tonbo-no-numa (Dragonfly pond, Takada-seki), Takadani, Isumi city, Chiba Pref., Japan, December 16, 2007 by Y. Tsukii