Genus: Filamentous algae, axis-branch differentiation incomplete; terminal cells tapered to form spiny projections;
branches do not form in tuft
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Branching not so frequent; secondary branching rare; branching axial cells shorter compared to non-branching cells; axial cells up to 8-12-(15) μm in diam., L/W=2-4; constriction present at cell junction (Illustration of the Japanese fresh-water algae, 1977).
Stigeoclonium tenue ?,
stock Ti-5, axenic culture with KCM & Hyponex (February 27 to March 29, 2003),
cell body μm long, μm wide,
x 640, Inari Park, Toyama city, Toyama Pref., Japan, September 2002, by Y. Tsukii
31 μm 63 μm 94 μm; x 640