Species: Cell body large in size, 117-125 μm long, 85-87 μm wide, isthmus 25-31 μm wide, L/W=1.3; semicells broad oviform, rounded at base; cellwall covered with conical granules, gradually becoming smaller toward the center of the semicells; (Illustrations of The Japanese Fresh-water Algae, 1977).
Google Image Search
Similar species -->> C. heterodentatum (Cristatae);
C. granulatum
130 x 90 μm
Koigakubo marsh
Tessei-cho
Okayama, 2004
C. granulatum
μm
Kareki-numa
Nikko
Tochigi, 2008
