 
 
|  Genus: 
Subgenus: with arm-like projections
(Illustrations of The Japanese Fresh-water Algae, 1977) Section: Hoplastrum (Apexes of semicells with projections; arm-like projections granulated or dented). Species: cell body excluding spines 28-44 μm long, 62-73 μm wide (with spines), constriction 85-15 μm wide, (Illustrations of The Japanese Fresh-water Algae, 1977) 
 
 | 
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400 :
 150 μm; x 400 : 
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
 
 
 
 
 
