Genus: Cell body flat, large, variable in shape, longer than wide; strong constriction at center; each semicell with several notches; cell wall with many short spines (Illustrations of The Japanese Fresh-water Algae, 1977).
![]() M. radiata x 640 |
![]() M. ceylanica x 640 |
![]() Micrasterias sp. x 640 |