Family: Filamentous algae without branching; cell body cylindrical or fusiform swelled at the center; a single or many chloroplasts plate-like or small disc-shaped (Illustrations of The Japanese Fresh-water Algae, 1977). Genus: Soil algae; "H" structure of the cell wall inconspicuous (Illustrations of The Japanese Fresh-water Algae, 1977). Species:

Similar genus ->> Tribonema;

31 μm 63 μm 94 μm; x 640

Images of collecting locality: Gyodashi-sogo park (Gyoda general park), Gyoda city, Saitama Pref., Japan, March 11, 2006 by Y. Tsukii

Xanthonema tenuissima Ettl: Cell body 35-40 μm long, 1.5 μm wide (Ettl, 1978).

Xanthonema stichococcoides Pascher: Cell body up to 8 μm long, 2-3 μm wide (Ettl, 1978).

Xanthonema monochloron Ettl: Cell body up to 4.5 μm long, 2-3 μm wide (Ettl, 1978).

Xanthonema mucicola Ettl: Cell body up to 15 μm long, 3.5 μm wide (Ettl, 1978).

Xanthonema constricta Ettl: Cell body up to 12-18 μm long, 3.5-4 μm wide (Ettl, 1978).

Xanthonema exilis (Klebs) Pascher: Cell body 6-8 μm long, 3.5-4.5 μm wide (Ettl, 1978).

Xanthonema hormidioides Vischer: Cell body 4-10 μm long, 4 μm wide (Ettl, 1978).

Xanthonema sessilis Vinatzer: Cell body 10-15 μm long, 4.5 μm wide (Ettl, 1978).

Xanthonema debilis Vischer: Cell body 5-10 μm long, 4-5 μm wide (Ettl, 1978).

Xanthonema montana Vischer: Cell body up to 7-10 μm long, 5 μm wide (Ettl, 1978).

Xanthonema solida Vischer: Cell body 5-12 μm long, 5-6 μm wide (Ettl, 1978).

Xanthonema pascheri Ettl: Cell body up to μm long, 6-8 μm wide (Ettl, 1978).

Xanthonema quadrata (Pascher) Pascher: Syn. Tribonema quadrata Pascher, Cell body up to μm long, 6.7-7.8 μm wide (Ettl, 1978).

Xanthonema ulotrichoides Pascher: Cell body up to 16 μm long, 9-12 μm wide (Ettl, 1978).

Xanthonema elegans Ettl: Cell body 50-70 μm long, 10 μm wide (Ettl, 1978).

Xanthonema tribonemoides Pascher: Cell body up to 18-30 μm long, 12-15 μm wide (Ettl, 1978).