|  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). |