Species:
Cell body slightly large, (62-87)-100 μm long, (45-70)-74 μm wide,
isthmus 37-53 μm wide, L/W=1.3; semicells elliptial, apex broadly rounded, slightly
flattened, apical view circular or broad ellipitical; cell wall covered with small pores interspersed with many dots,
(Illustrations of The Japanese Fresh-water Algae, 1977).
Cosmarium connatum (= Actinotaenium connatum) Brébisson ex Ralfs,
cell body 73 μm long, 51 μm wide, isthmus 43 μm wide,
x 200, x 400, x 640, a wetland near Ichinose-enchi (along super forest road), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
a wetland near Ichinose-enchi (along super forest road), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii