Family: Unicells or cells loosely attached forming hyphae; cell body varied in shape, a constriction at the center in most species; cell walls consisting of two or more parts, with small pores and various ornaments (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Cell body long, with a constriction at its center; each half-cell laterally straight or wavy; rings of spines at each peak of the waves (similar to Pleurotaenium nodosum or P. kayei); 2-4 arm-like projections at each ends; chloroplasts consisting of a central rod and radial laminae; pyrenoids aligned at the rod (Illustrations of The Japanese Fresh-water Algae, 1977).
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Similar species ->> Pleurotaenium kayei; P. nodosum; Docidium undulatum;
T. gracile
363 μm
Higashi-hiroshima
Hiroshima, 1998
Movies 
T. gracile
420 x 30 μm
Kashibaru marsh 5
Karatsu
Saga, 2006
T. gracile
μm
Kashibaru m.2-4
Karatsu
Saga, 2008
T. gracile
μm
Kashibaru m.2-5
Karatsu
Saga, 2008
T. gracile
μm
Kashibaru m.II
Karatsu
Saga, 2008
